AMERICAN TECHNOLOGY CORP /DE/
S-3, 2000-05-01
HOUSEHOLD AUDIO & VIDEO EQUIPMENT
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<PAGE>

AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON MAY 1, 2000

                                              Registration No.
================================================================================


                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549

                                   FORM S-3
                            REGISTRATION STATEMENT
                                     UNDER
                          THE SECURITIES ACT OF 1933

                        AMERICAN TECHNOLOGY CORPORATION
            (Exact name of Registrant as specified in its charter)



            Delaware                                87-0361799
(State or other jurisdiction of        (I.R.S. Employer Identification Number)
of incorporation or organization)


                        13114 Evening Creek Drive South
                          San Diego, California 92128
                                 (858) 679-2114

  (Address, including zip code, and telephone number, including area code, of
                   Registrant's principal executive offices)

                   -----------------------------------------

                              Cornelius J. Brosnan
                Chairman, President and Chief Executive Officer
                        AMERICAN TECHNOLOGY CORPORATION
                        13114 Evening Creek Drive South
                          San Diego, California 92128
                                 (858) 679-2114
 (Name, address, including zip code, and telephone number, including area code,
                             of agent for service)

                   -----------------------------------------

                                   Copies to:

                          Timothy J. Fitzpatrick, Esq.
                    Procopio, Cory, Hargreaves & Savitch LLP
                            530 B Street, Suite 2100
                              San Diego, CA 92101
                                 (619) 239-1800
<PAGE>

APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC:
From time to time after this Registration Statement becomes effective.

     If the only securities being registered on this Form are being offered
pursuant to dividend or interest reinvestment plans, please check the following
box. [ ]

     If any of the securities being registered on this Form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, other than securities offered in connection with dividend or interest
reinvestment plans, check the following box. [X]

     If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering. [ ]

     If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [ ]

     If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box. [ ]


                        CALCULATION OF REGISTRATION FEE

<TABLE>
<CAPTION>

                                                                               PROPOSED MAXIMUM
     TITLE OF SECURITIES        AMOUNT TO BE     PROPOSED MAXIMUM OFFERING        AGGREGATE          AMOUNT OF
      TO BE REGISTERED           REGISTERED           PRICE PER SHARE           OFFERING PRICE    REGISTRATION FEE
- ------------------------------------------------------------------------------------------------------------------
<S>                             <C>                      <C>                     <C>                 <C>
Common Stock,
$.00001 par value                1,733,878                $8.187                 $14,195,259         $3,747.55
- ------------------------------------------------------------------------------------------------------------------
</TABLE>


(1)  Estimated solely for the purpose of calculating the amount of the
     registration fee pursuant to Rule 457(c) of the Securities Act of 1933. The
     price per share and aggregate offering price are based upon the average of
     the high and low sales price of American Technology Corporation's common
     stock on April 26, 2000 as reported on the NASDAQ Small Cap Market. It is
     not known how many shares will be purchased under this registration
     statement or at what price such shares will be purchased.

THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR DATES
AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL FILE
A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION STATEMENT
SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(A) OF THE
SECURITIES ACT OF 1933 OR UNTIL THE REGISTRATION STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION 8(A),
MAY DETERMINE.
<PAGE>

                                  PROSPECTUS

THE INFORMATION CONTAINED IN THIS PROSPECTUS IS NOT COMPLETE AND MAY BE CHANGED.
THESE SECURITIES MAY NOT BE SOLD TO YOU UNTIL THE REGISTRATION STATEMENT FILED
WITH THE SECURITIES AND EXCHANGE COMMISSION IS EFFECTIVE. THIS PROSPECTUS IS NOT
AN OFFER TO SELL THESE SECURITIES AND WE ARE NOT SOLICITING AN OFFER TO BUY
THESE SECURITIES IN ANY STATE WHERE THE OFFER OR SALE IS NOT PERMITTED.

                  SUBJECT TO COMPLETION, DATED MAY 1, 2000

                                1,733,878 SHARES

                        AMERICAN TECHNOLOGY CORPORATION

                                  COMMON STOCK

     We are registering our common stock for resale by the selling stockholders
identified in this prospectus. We will not receive any of the proceeds from the
sale of shares by the selling stockholders. Our common stock is listed in the
NASDAQ SmallCap Market under the symbol "ATCO." The closing sale price of our
common stock, as reported on the NASDAQ SmallCap Market on April 26, 2000, was
$7.75 per share.

     The selling stockholders may sell the shares of common stock described in
this prospectus in public or private transactions, on or off the NASDAQ SmallCap
Market, at prevailing market prices, or at privately negotiated prices. The
selling stockholders may sell shares directly to purchasers or through brokers
or dealers. Brokers or dealers may receive compensation in the form of
discounts, concessions or commissions from the selling stockholders.

     INVESTING IN THE COMMON STOCK INVOLVES A HIGH DEGREE OF RISK. SEE "RISK
FACTORS," BEGINNING ON PAGE 2.

     NEITHER THE SECURITIES EXCHANGE COMMISSION NOR ANY STATE SECURITIES
COMMISSION HAS APPROVED OR DISAPPROVED OF THESE SECURITIES OR DETERMINED IF THIS
PROSPECTUS IS TRUTHFUL OR COMPLETE. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.

              The date of this prospectus is ____________, 2000.


<PAGE>

                                  THE COMPANY

     We are a consumer electronics company that develops, markets and licenses
proprietary sound reproduction and other electronic technologies. Our primary
business is in the marketing of two proprietary sound reproduction technologies,
SFT(TM), Stratified Field Technology and HSS(TM), Hypersonic Sound Technology.
We also market a line of portable consumer electronic products under our own
label.

     SFT(TM) is an advanced speaker technology with some of the same
characteristics as electrostatic speakers, which are known for very high sound
quality and low distortion. Our SFT(TM) technology consists of several high
performance, non-magnetic flat panel speaker designs with a favorable size/low
bass response relationship.

     Our HSS(TM) technology creates a new method of sound reproduction using a
proprietary electronic process which causes an ultrasonic beam to interact in
mid-air producing wide spectrum audio along the beam. The sound beam has a very
high degree of directionality and we believe it maintains sound volume over
longer distances than traditional methods of sound reproduction.

     Our objective is to be a leader in developing, marketing and licensing
sound reproduction technologies that address large and expanding domestic and
international consumer electronics markets. We seek to have our SFT(TM) and
HSS(TM) technologies become important alternatives to conventional loudspeakers
in target market segments. We believe it is becoming increasingly difficult for
manufacturers to differentiate their sound reproduction electronic products to
offer consumers new choices. We also believe the rapid emergence of flat panel
computer and television monitors and the growing computer multimedia market
provides growing new opportunities for SFT(TM).

          Our executive offices are located at 13114 Evening Creek Drive South,
San Diego, California 92128, telephone number (858) 679-2114. The Company's web
site address is http://www.atcsd.com/. Information contained in our web site is
not part of this prospectus.

                                USE OF PROCEEDS

     We will not receive any proceeds from the sale of the shares of common
stock offered by the selling stockholders.

                                 RISK FACTORS

     An investment in our shares as offered in this prospectus involves a high
degree of risk. The SEC allows us to "incorporate by reference" information that
we file with it, which means that we can disclose important information to you
by referring you to those documents. The information incorporated by reference
is considered to be part of this prospectus, and information that we file later
with the SEC will periodically update and supersede this information. In
deciding whether to purchase shares of our common stock, you should carefully
consider the following risk factors, in addition to other information contained
in this prospectus as well as any other documents incorporated by reference into
this prospectus. This prospectus also contains forward-looking statements that
involve risks and uncertainties. Our actual results could differ materially from
those discussed here or incorporated by reference. Factors that could cause or
contribute to differences in our actual results include those discussed in this
section, as well as those discussed elsewhere in this prospectus and in other
documents incorporated by reference into this prospectus.

                                       2
<PAGE>

WE HAVE A HISTORY OF NET LOSSES. WE EXPECT TO CONTINUE TO INCUR NET LOSSES AND
WE MAY NOT ACHIEVE OR MAINTAIN PROFITABILITY.

     We have an accumulated deficit of $11,805,647 as of September 30, 1999 and
$12,719,526 as of March 31, 2000, with net losses of $3,041,634 for fiscal 1999,
$4,593,713 for fiscal 1998 and $372,344 for the three months ended March 31,
2000. We also expect to incur additional operating losses in future periods. We
cannot guarantee that we will be able to achieve or sustain significant periods
of profitability in the future. In addition, the sales of our products are
subject to significant quarterly and seasonal variability. We have been and we
expect to continue to be reliant on a limited number of customers, and the loss
of any of these customers could adversely effect our financial condition and
results of operations.

WE WILL NEED ADDITIONAL CAPITAL IN THE FUTURE.  IF ADDITIONAL CAPITAL IS NOT
AVAILABLE TO US, WE WILL HAVE TO CURTAIL OR CEASE OPERATIONS.

     We intend to fund our operations and other capital needs for the next
twelve months substantially from cash on hand resulting from the proceeds from
equity offerings. We will need substantial funds for operating costs and working
capital during the next twelve months. We may also need funds for future
expansion of our operations. We cannot guarantee, however, that existing funds,
and those generated from operations, if any, will be sufficient. Further, we
cannot guarantee that future additional financing, if required, will be
available on acceptable terms, if at all.

WE ARE AN EARLY STAGE COMPANY DEVELOPING NEW TECHNOLOGIES.  IF WE DO NOT DEVELOP
COMMERCIALLY SUCCESSFUL PRODUCTS, WE MAY BE UNPROFITABLE OR FORCED TO CEASE
OPERATIONS.

     Our SFT(TM) and HSS(TM) technologies are still in the development stage. We
cannot guarantee that a commercially viable SFT(TM) or HSS(TM) technology system
can be completed due to the inherent risks of technology development,
limitations on financing, competition, obsolescence, loss of key technical
personnel and other factors. We have not generated significant revenues from
SFT(TM) or the HSS(TM) technology to date, and we cannot guarantee any
significant revenues in the future.

     The development of SFT(TM) and the HSS(TM) technology has taken longer than
anticipated by management and could be subject to additional delays. Moreover,
we cannot guarantee that a commercially viable SFT(TM) or HSS(TM) technology
will be completed on a timely basis, or would perform on a cost-effective basis.

          Even if SFT(TM) or HSS(TM) technology is introduced, we can make no
assurances that it will achieve market acceptance. Our various development
projects are high risk in nature, and unanticipated technical obstacles can
arise at any time and result in lengthy and costly delays or result in a
determination that further development is unfeasible. If we do not successfully
develop and exploit our technology, our financial condition and results of
operations and business prospects would be adversely effected.

MANY POTENTIAL COMPETITORS WHO HAVE GREATER RESOURCES AND EXPERIENCE THAN WE DO
MAY DEVELOP PRODUCTS AND TECHNOLOGIES THAT MAKE OURS OBSOLETE.

     Technological competition from other and more established electronic and
loudspeaker manufacturers is significant and expected to increase. Most of the
companies with which we expect to compete have substantially greater capital
resources, research and development staffs, marketing and distribution programs
and facilities. Many of them also have substantially greater experience in the
production and marketing of products. In addition, one or more of our
competitors may have developed or may succeed in developing technologies and
products that are more effective than any of ours, rendering our technology and
products obsolete or noncompetitive.

                                       3
<PAGE>

OUR NEW TECHNOLOGY FACES SIGNIFICANT BARRIERS AND RISKS.

     The introduction of new technology targeted for wide use often faces
barriers to commercialization and many risks that cannot currently be
identified. Accordingly, our commercialization of SFT(TM) and the HSS(TM)
technology may face many unknown barriers and risks. For example, the HSS(TM)
technology employs ultrasonics. Although ultrasonics are employed in a wide
variety of medical and industrial applications, we cannot guarantee that we will
not face barriers to introduction due to the use of ultrasonics. Our technology
uses relatively small amounts of ultrasonic energy which dissipates rapidly in
air. In addition, we employ frequencies above those that may be harmful to pets
but within those used by medical devices. Although we believe the frequencies
and the amount of energy employed is harmless, and that the emission of such
frequencies is not presently subject to government regulation, barriers to
commercialization may develop or ultrasonics may become subject to future
regulation or interpretation of existing regulation.

COMMERCIALIZATION OF OUR TECHNOLOGIES DEPENDS ON COLLABORATIONS WITH OTHER
COMPANIES.  IF WE ARE NOT ABLE TO FIND COLLABORATORS AND STRATEGIC ALLIANCE
RELATIONSHIPS IN THE FUTURE, WE MAY NOT BE ABLE TO DEVELOP OUR TECHNOLOGIES AND
PRODUCTS.

     Our strategy is to establish business relationships with leading
participants in various segments of the electronics and sound reproduction
markets to assist us in developing, marketing and selling consumer electronic
products and products that include our SFT(TM) or HSS(TM) technologies. We
believe this strategy will enable us to take advantage of the superior financial
resources, technological capabilities, proprietary positions and market presence
of these companies in developing, marketing and selling products, if any, that
result from the SFT(TM) or HSS(TM) technology in the sound reproduction market.
Although our strategy is to establish closer relationships with selected
companies through specific product collaborations, licensing or product supply
arrangements, we may not be able to successfully collaborate to develop
commercial products to exploit our technologies. To date, we have entered into
only two such collaborative arrangements.

     Our success will depend on our ability to enter into strategic arrangements
with new partners on commercially reasonable terms. If we fail to enter into
such strategic arrangements with third parties, our financial condition, results
of operations, cash flows and business prospects may be adversely effected. Any
future relationships may require us to share control over our development,
manufacturing and marketing programs or to relinquish rights to certain versions
of our technology.

ANY INABILITY TO ADEQUATELY PROTECT OUR PROPRIETARY TECHNOLOGIES COULD HARM OUR
COMPETITIVE POSITION.

     We have nineteen patent applications pending on our sound reproduction
technologies and we are considering additional patent applications. We cannot
guarantee that patents will be issued from any of our pending applications, or
that any claims allowed from existing or pending patents will be of sufficient
scope or strength or that any patents that may be issued to us will not be
challenged or invalidated. Further, we cannot guarantee the patents will be
issued in all countries where our products can be sold or licensed to provide us
meaningful protection or any commercial advantage. Our competitors may also be
able to design around our patents.

     The electronics industry is characterized by vigorous protection and
pursuit of intellectual property rights or positions, which have resulted in
significant and often protracted and expensive litigation. There is currently no
pending intellectual property litigation against us. We cannot guarantee,
however, that our technologies or products do not and will not infringe the
patents or proprietary rights of

                                       4
<PAGE>

third parties. Problems with patents or other rights could potentially increase
the cost of our products, or delay or preclude our new product development and
commercialization. If infringement claims against us are deemed valid, we may
seek licenses which might not be available on acceptable terms or at all.
Litigation could be costly and time-consuming but may be necessary to protect
our future patent and/or technology license positions, or to defend against
infringement claims. A successful challenge to the SFT(TM) or HSS(TM) technology
could have a materially adverse effect on our business prospects. Moreover, we
cannot guarantee that the application of any of our technologies will not
infringe upon the proprietary rights of others or that licenses required by us
from others will be available on commercially reasonable terms, if at all.

OUR PRODUCT SALES ARE DEPENDENT ON OUTSIDE CONTRACTORS.  DISRUPTIONS IN SUPPLY
COULD ADVERSELY AFFECT US.

     Consumer electronic product sales accounts for substantially all of our
revenues. However, we are dependent on contract suppliers for our finished
consumer electronics products. We source products developed by others from a
variety of suppliers. The loss of a supply of a high selling product could have
a material adverse effect on our operations. Disruption of our supply could
cause additional costs and delays and could also have an adverse impact on our
operations.

     The manufacturers of our consumer electronic products are also dependent
upon the availability of electronic components. We believe there are secondary
suppliers of components and subassemblies for our manufacturers so that the
products they manufacture are not reliant on one supplier, although delays could
result should there be a change in suppliers of longer lead time components or
subassemblies. Any significant delays in obtaining components from existing or
secondary suppliers through supplier changes or from component shortages, which
are common to the electronics industry, could have a material adverse effect on
our financial condition and results of operations.

IF OUR KEY EMPLOYEES DO NOT CONTINUE TO WORK FOR US, OUR BUSINESS WILL BE HARMED
BECAUSE COMPETITION FOR REPLACEMENTS IS INTENSE.

     Our performance is substantially dependent on the performance of our
executive officers and key technical employees. Given our early stage of
development, we are dependent on our ability to retain and motivate high quality
personnel, especially our management and highly skilled technical personnel.

     Our future success and growth also depends on our continuing ability to
identify, hire, train and retain other highly qualified technical, managerial
and sales personnel. Since competition for such personnel is intense, we cannot
guarantee that we will be able to attract, assimilate or retain other highly-
qualified technical, managerial or sales personnel in the future. If we cannot
attract and retain the necessary technical, managerial or sales personnel our
business, operating results or financial condition could be adversely effected.

WE HAVE CERTAIN CONFLICTS OF INTEREST DUE TO PART-TIME MANAGEMENT AND
RELATIONSHIPS.

     Certain of our officers, including Elwood G. Norris, the inventor of our
technologies, devote only part-time services to us and have other employment and
business interests to which they devote attention and will continue to do so,
resulting in certain conflicts of interest. These conflicts of interest could
have a material adverse impact on business.

                                       5
<PAGE>

OUR CERTIFICATE OF INCORPORATION, BYLAWS AND DELAWARE LAW CONTAIN PROVISIONS
THAT COULD DISCOURAGE A THIRD PARTY FROM ACQUIRING US AND, CONSEQUENTLY,
DECREASE THE MARKET VALUE OF YOUR INVESTMENT.

     Some provisions of our amended certificate of incorporation and bylaws and
Delaware law could delay or prevent a change in control or changes in our
management that a stockholder might consider favorable. If a change of control
or change in management is delayed or prevented, the market price of our common
stock could decline.

CONVERSION OF ALL OF OR PART OF OUR OUTSTANDING CONVERTIBLE PREFERRED STOCK
AND/OR THE EXERCISE OF OUTSTANDING WARRANTS WILL CAUSE IMMEDIATE AND POSSIBLY
SIGNIFICANT DILUTION IN THE NET TANGIBLE BOOK VALUE OF YOUR SHARES.

     If the holders of our outstanding preferred stock and/or warrants decide to
convert or exercise all or part of their preferred stock or warrants, you will
experience immediate and possibly significant dilution in the net tangible book
value of your shares. The market price of our common stock could also decline
upon the sale of the common stock after conversion of the preferred stock or
upon exercise of the warrants.

OUR STOCK PRICE IS VOLATILE.

     The market price of our common stock has fluctuated significantly to date.
In the future, the market price of our common stock could be subject to
significant fluctuations due to general market conditions and in response to
quarter-to-quarter variations in (i) our anticipated or actual operating
results; (ii) developments concerning our sound reproduction technologies; (iii)
technological innovations or setbacks by us or our competitors; (iv) conditions
in the consumer electronics market; (v) announcements of merger or acquisition
transactions; and (vi) other events or factors and general economic and market
conditions.

     In addition, the stock market in recent years has experienced extreme price
and volume fluctuations that have effected the market price of many technology
companies, and that have often been unrelated or disproportionate to the
operating performance of companies. These fluctuations, as well as general
economic and market conditions, may harm the market price of our common stock.

                             SELLING STOCKHOLDERS

     We are registering for resale certain shares of our common stock. The
following table sets forth certain information as of April 26, 2000 with respect
to the selling stockholders. This information is based upon information provided
by selling stockholders, and assumes the sale of all of the resale shares by the
selling stockholders. The term "selling stockholder" includes the stockholders
listed below and their transferees, pledgees, donees or other successors. The
applicable percentages of ownership are based on an aggregate of 12,064,714
shares of common stock outstanding as of April 26, 2000.

                                       6
<PAGE>

<TABLE>
<CAPTION>
                          Common                Common          Common                      Shares of
                          Stock                 Stock           Stock         Maximum        Common
                       Beneficially           Underlying      Underlying     Number of        Stock
                          Owned               Convertible       Common        Shares       Beneficially
                          Before               Preferred         Stock        Offered       Owned After
                         Offering                Stock          Warrant       Hereby         Offering
                         -------                -------         --------      -------        -------
                           (1)                    (2)              (3)          (4)
                         -------                -------           ------      -------
Name                      Number    %                                                          Number    %
- -----------------        -------   ---                                                         ------   ---
<S>                      <C>       <C>           <C>              <C>          <C>             <C>     <C>
Canusa Trading,           97,435    *            51,411           12,500       63,911          33,524    *
 Ltd
Veech Trust               25,565    *            20,565            5,000       25,565             -0-   -0-
Nasouh Kadri              25,565    *            20,565            5,000       25,565             -0-   -0-
Amad E. Kadry, MD         25,565    *            20,565            5,000       25,565             -0-   -0-
Anthony J.                12,782    *            10,282            2,500       12,782             -0-   -0-
Maddelina
Adnan and                 12,782    *            10,282            2,500       12,782             -0-   -0-
Marlene Aladray
Wayne J.                  12,782    *            10,282            2,500       12,782             -0-   -0-
Coulon
Scott McCue               12,782    *            10,282            2,500       12,782             -0-   -0-
Keith McCue               12,782    *            10,282            2,500       12,782             -0-   -0-
Craig Schilling           25,565    *            20,565            5,000       25,565             -0-   -0-
Victor Gabourel           25,565    *            20,565            5,000       25,565             -0-   -0-
Georgaklis                25,565    *            20,565            5,000       25,565             -0-   -0-
 Family Trust
Peter Turner              25,565    *            20,565            5,000       25,565             -0-   -0-
Robert Gabourel           12,782    *            10,282            2,500       12,782             -0-   -0-
Charles Taft              12,782    *            10,282            2,500       12,782             -0-   -0-
Harrington &              25,565    *            20,565            5,000       25,565             -0-   -0-
Partners, Ltd.
Leo E. Correia            38,347    *            30,847            7,500       38,347             -0-   -0-
Tonga Partners,           89,476    *            71,976           17,500       89,476             -0-   -0-
 LP
Anegada Fund, Ltd         38,347    *            30,847            7,500       38,347             -0-   -0-
Magellan                 127,823    *           102,823           25,000      127,823             -0-   -0-
 International
 Ltd.
Acqua Wellington         127,823    *           102,823           25,000      127,823             -0-   -0-
 Small Cap
    Value Fund,
Ltd.
D.R. Jacobs and           25,565    *            20,565            5,000       25,565             -0-   -0-
 Nancy Jacobs
</TABLE>

                                       7
<PAGE>

<TABLE>
<CAPTION>
                          Common                Common          Common                      Shares of
                          Stock                 Stock           Stock         Maximum        Common
                       Beneficially           Underlying      Underlying     Number of        Stock
                          Owned               Convertible       Common        Shares       Beneficially
                          Before               Preferred         Stock        Offered       Owned After
                         Offering                Stock          Warrant       Hereby         Offering
                         -------                -------         --------      -------        -------
                           (1)                    (2)              (3)          (4)
                         -------                -------           ------      -------
Name                      Number    %                                                          Number    %
- -----------------        -------   ---                                                         ------   ---
<S>                      <C>       <C>           <C>              <C>          <C>             <C>     <C>
Jerry E. Polis            38,347    *            30,847            7,500       38,347             -0-   -0-
Family Trust
Eric M. Polis             20,565    *            20,565            5,000       25,565             -0-   -0-
J.M. Hull                 78,629    *            41,129           10,000       51,129          27,500    *
Associates
Hull Overseas,            78,629    *            41,129           10,000       51,129          27,500    *
Ltd.
Nazeah Aladray             2,782    *            10,282            2,500       12,782             -0-   -0-
Greg Holcomb              25,565    *            20,565            5,000       25,565             -0-   -0-
Robert L. Wood            51,129    *            41,129           10,000       51,129             -0-   -0-
 TTEE
James C &                 89,476    *            71,976           17,500       89,476             -0-   -0-
Josephine M.
Zolin
Daniel A.                 25,565    *            20,565            5,000       25,565             -0-   -0-
Nunes
Stifel Nicolaus,         101,129    *            41,129           10,000       51,129          50,000    *
 Custodian for
Jonathan Berg
Richard G.               153,388    *           123,388           30,000      153,388             -0-   -0-
Daniels
John C. Roemer           102,258    *            82,258           20,000      102,258             -0-   -0-
The Kenneth E. &          25,565    *            20,565            5,000       25,565             -0-   -0-
 Suzanne
Jordan Family
Trust
Barbara Templeton         25,565    *            20,565            5,000       25,565             -0-   -0-
Stephen M.               100,000    *               -0-              -0-      100,000             -0-   -0-
Williams
David Graebener          100,000    *               -0-              -0-      100,000             -0-   -0-
</TABLE>

*    Less than one percent

(1)  To our knowledge, the selling stockholders have sole voting and investment
     power with respect to all common stock shown as beneficially owned by them,
     subject to community property laws where applicable.  The table includes
     shares of common stock that the selling stockholders have the right to
     acquire pursuant to the exercise of warrants and shares of common stock
     issuable to the selling stockholders upon the conversion of Series C
     Preferred Stock held by them.

                                       8
<PAGE>

(2)  Represents shares of common stock issuable upon the conversion of
     $6,000,000 of Series C Preferred Stock beneficially owned by such persons
     assuming the conversion price is $5.75 per share.  Includes shares issuable
     as accretion assuming the Series C Preferred Stock is held to the end of
     their term to March 31, 2003.  The actual number of shares of common stock
     issuable for accretion may be less if conversion occurs prior to the due
     date.

(3)  Includes 300,000 shares of common stock issuable upon exercise of the
     Warrants issued or issuable upon conversion of Series C Preferred Stock.
     The warrants are exercisable at $11.00 per common share.

(4)  Includes issuance of the maximum shares of common stock on conversion of
     the Series C Preferred Stock and exercise of the Warrants, assuming a price
     of $5.75 and $11.00 per share, respectively, (see Notes 2 and 3).

Except as described below, none of the selling stockholders in the above table
has had any material relationship other than as an employee or consultant, with
us or any of our predecessors or affiliates within the last three years.

     Effective February 15, 2000, Stephen Williams has been the president of a
division of the Company, and David Graebener has been Director of Research and
Development for the Company.

                             PLAN OF DISTRIBUTION

     The resale shares of common stock may be sold from time to time by the
selling stockholders in one or more transactions at fixed prices, at market
prices at the time of sale, at varying prices determined at the time of sale or
at negotiated prices. The selling stockholders may offer their shares of common
stock in one or more of the following transactions:

     -      on any national securities exchange or quotation service at
            which the common stock may be listed or quoted at the time of sale,
            including the over-the-counter market on the NASDAQ SmallCap Market,

     -      in private transactions,

     -      through options,

     -      by pledge to secure debts and other obligations, or a
            combination of any of the above transactions.

     If required, we will distribute a supplement to this prospectus to describe
material changes in the terms of the offering.

     The shares of common stock described in this prospectus may be sold from
time to time directly by the selling stockholders. Alternatively, the selling
stockholders may from time to time offer shares of common stock to or through
underwriters, broker/dealers or agents. The selling stockholders and any
underwriters, broker/dealers or agents that participate in the distribution of
the shares of common stock may be deemed to be "underwriters" within the meaning
of the Securities Act of 1933. Any profits on the resale of shares of common
stock and any compensation received by any underwriter, broker/dealer or agent
may be deemed to be underwriting discounts and commissions under the Securities
Act of 1933.

                                       9
<PAGE>

     Any shares covered by this prospectus which qualify for sale pursuant to
Rule 144 under the Securities Act of 1933 may be sold under Rule 144 rather than
pursuant to this prospectus. The selling stockholders may not sell all of the
shares. The selling stockholders may transfer, devise or gift such shares by
other means not described in this prospectus.

     To comply with the securities laws of certain jurisdictions, the common
stock must be offered or sold only through registered or licensed brokers or
dealers. In addition, in certain jurisdictions, the common stock may not be
offered or sold unless they have been registered or qualified for sale or an
exemption is available and complied with.

     Under the Securities Exchange Act of 1934, any person engaged in a
distribution of the common stock may not simultaneously engage in market-making
activities with respect to the common stock for nine business days prior to the
start of the distribution. In addition, each selling stockholder and any other
person participating in a distribution will be subject to the Securities
Exchange Act of 1934 which may limit the timing of purchases and sales of common
stock by the selling stockholders or any such other person. These factors may
affect the marketability of the common stock and the ability of brokers or
dealers to engage in market-making activities.

     We will pay all expenses of this registration. These expenses include the
SEC's filing fees and fees under state securities or "blue sky" laws. All
expenses for the issuance of a supplement to this prospectus, when requested by
selling stockholder(s), will be paid by the requesting stockholder(s). The
selling stockholders may pay selling commissions or brokerage fees with respect
to the sale of the resale shares by them.

                                 LEGAL MATTERS

     Procopio, Cory, Hargreaves & Savitch LLP will pass upon the validity of the
common stock offered by this prospectus.

                                    EXPERTS

     The financial statements and schedules of the registrant as of September
30, 1999 incorporated by reference in this prospectus have been audited by BDO
Seidman, LLP, independent certified public accountants, to the extent and for
the periods set forth in their report thereon included in our Annual Report on
Form 10-K for the year ended September 30, 1999, as amended by Form 10-K/A,
incorporated herein by reference, and are incorporated herein in reliance upon
such report given upon the authority of said firm as experts in auditing and
accounting.

                                       10
<PAGE>

                DISCLOSURE REGARDING FORWARD-LOOKING STATEMENTS

     This prospectus, including the documents that we incorporate by reference,
contains forward-looking statements within the meaning of Section 27A of the
Securities Act of 1933, as amended and Section 21E of the Securities Exchange
Act of 1934, as amended. Any statements about our expectations, beliefs, plans,
objectives, assumptions or future events or performance are not historical facts
and may be forward-looking. These statements are often, but not always, made
through the use of words or phrases like "anticipate," "estimate," "plans,"
"projects," "continuing," "ongoing," "expects," "management believes," "the
Company believes," "the Company intends," "we believe," "we intend" and similar
words or phrases. Accordingly, these statements involve estimates, assumptions
and uncertainties which could cause actual results to differ materially from
those expressed in them. Any forward-looking statements are qualified in their
entirety by reference to the factors discussed in this prospectus or
incorporated by reference.

     Because the factors discussed in this prospectus or incorporated herein by
reference could cause actual results or outcomes to differ materially from those
expressed in any forward-looking statements made by us or on behalf of us, you
should not place undue reliance on any such forward-looking statements. Further,
any forward-looking statement speaks only as of the date on which it is made,
and we undertake no obligation to update any forward-looking statement or
statements to reflect events or circumstances after the date on which such
statement is made or to reflect the occurrence of unanticipated events. New
factors emerge from time to time, and it is not possible for us to predict which
will arise. In addition, we cannot assess the impact of each factor on our
business or the extent to which any factor, or combination of factors, may cause
actual results to differ materially from those contained in any forward-looking
statements.

                      WHERE YOU CAN GET MORE INFORMATION

     We are a reporting company and file annual, quarterly and current reports,
proxy statements and other information with the SEC. You may read and copy these
reports, proxy statements and other information at the SEC's public reference
rooms in Washington, D.C., New York, NY and Chicago, IL. You can request copies
of these documents by writing to the SEC and paying a fee for the copying cost.
Please call the SEC at 1-800-SEC-0330 for more information about the operation
of the public reference rooms. Our SEC filings are also available at the SEC's
website at "http:\\www.sec.gov."

     The SEC allows us to "incorporate by reference" information that we file
with them, which means that we can disclose important information to you by
referring you to those documents. The information incorporated by reference is
an important part of this prospectus, and information that we file later with
the SEC will automatically update and supersede this information. We incorporate
by reference the documents listed below and any future filings we will make with
the SEC under Section 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act
of 1934:

     -      Annual Report on Form 10-K for the year ended September 30,
            1999, as amended by Form 10K/A;

     -      Quarterly Reports on Form 10-Q for the quarters ended December 31,
            1999 and March 31, 2000;

     -      Definitive Proxy Statement dated March 1, 2000 filed
            in connection with our 2000 Annual Meeting of Shareholders;

                                       11
<PAGE>

     -      Current Report on Form 8-K filed with  the SEC on
            April 19, 2000;

     -      Current Report on Form 8-K filed with  the SEC on
            April 26, 2000;

     -      Registration Statement on Form 10-SB, which includes a
            description of our common stock.

     You may request a copy of these filings at no cost, by writing or
telephoning us at the following address or telephone number:

            American Technology Corporation
            13114 Evening Creek Drive South
            San Diego, CA  92128
            Attn:  Secretary
            (858) 679-2114

                                       12
<PAGE>

WE HAVE NOT AUTHORIZED ANY DEALER, SALESPERSON OR OTHER PERSON TO GIVE ANY
INFORMATION OR TO MAKE ANY REPRESENTATIONS NOT CONTAINED IN THIS PROSPECTUS OR
ANY PROSPECTUS SUPPLEMENT. YOU MUST NOT RELY ON ANY UNAUTHORIZED INFORMATION.
THIS PROSPECTUS IS NOT AN OFFER OF THESE SECURITIES IN ANY STATE WHERE AN OFFER
IS NOT PERMITTED. THE INFORMATION IN THIS PROSPECTUS IS CURRENT AS OF THE DATE
OF THIS PROSPECTUS. YOU SHOULD NOT ASSUME THAT THIS PROSPECTUS IS ACCURATE AS OF
ANY OTHER DATE.

                               1,733,878 SHARES

                        AMERICAN TECHNOLOGY CORPORATION

                                 COMMON STOCK



                               TABLE OF CONTENTS


                                                     Page
                                                     ----
The Company                                             2
Use of Proceeds                                         2
Risk Factors                                            2
Selling Stockholders                                    6
Plan of Distribution                                    9
Legal Matters                                          10
Experts                                                10
Disclosure Regarding Forward-Looking Statements        11
Where You Can Get More Information                     11

                                       13
<PAGE>

                                    PART II

                    INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 14. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.

     The expenses in connection with the issuance and distribution of the
securities being registered are set forth in the following table (all amounts
except the registration fee are estimated):


     SEC Registration Fee...........   $ 3,747
     Legal fees and expenses........   $ 6,000
     Accounting fees and expenses...   $ 5,000
     Printing & Engraving...........   $   500
                                       -------
     Total..........................   $15,247
     =====                             =======


ITEM 15. INDEMNIFICATION OF OFFICERS AND DIRECTORS.

     As permitted by Delaware law, our Certificate of Incorporation provides
that the we will indemnify our officers, directors, employees and agents against
attorneys' fees and other expenses and liabilities they incur to defend, settle
or satisfy any civil or criminal action brought against them arising out of
their association with or activities on behalf of us unless, in any such action,
the are adjudged to have acted with gross negligence or to have engaged in
willful misconduct. We may also bear the expenses of such litigation for any
such persons upon their promise to repay such sums if it is ultimately
determined that they are not entitled to indemnification. Such expenditures
could be substantial and may not be recouped, even if we are so entitled.
Insofar as indemnification for liabilities arising under the Securities Act may
be permitted to directors, officers or persons controlling us pursuant to the
foregoing provisions, we have been informed that, in the opinion of the
Securities and Exchange Commission, such indemnification is against public
policy as expressed in the Securities Act and is, therefore, unenforceable.

     Pursuant to the General Corporation Law of Delaware, our Certificate of
Incorporation excludes personal liability on the part of its directors to the
Company for monetary damages based upon any violation of their fiduciary duties
as directors, except as to liability for any breach of the duty of loyalty, acts
or omissions not in good faith or which involve intentional misconduct or a
knowing violation of law, acts in violation of Section 174 of the General
Corporation Law of Delaware, or any transaction from which a director receives
an improper personal benefit. This exclusion of liability does not limit any
right which a director may have to be indemnified and does not affect any
director's liability under federal or applicable state securities laws.


                                     II-1
<PAGE>

ITEM 16. EXHIBITS.

         (a) Exhibits.

Exhibit No.      Description
- -----------      -----------

3.1              Corrected Certificate of Designation of Series C Preferred
                 stock filed with Delaware on April 19, 2000.(1)

4.1              Form of Warrant Agreement between the registrant and certain
                 investors dated March 16, 2000.(1)

5.1              Opinion of Procopio, Cory, Hargreaves & Savitch LLP.*

10.1             Form of Series C Preferred Stock and Warrant Purchase Agreement
                 between the registrant and certain investors dated March 14,
                 2000.*

10.2             Asset Purchase Agreement between the registrant, Hucon Limited,
                 Stephen M. Williams and David Graebener dated April 11, 2000.
                 (Schedules to this exhibit have been omitted as permitted by
                 Item 601 of Regulation S-K.)(2)


23.1             Consent of BDO Seidman, LLP, independent certified public
                 accountants.*

23.2             Consent of Procopio, Cory, Hargreaves & Savitch LLP
                 Reference is made to Exhibit 5.1.*

24.1             Power of Attorney. Reference is made to Page II-5.




- ---------------------------
(1)  Previously filed on Form 8-K with the Commission on April 19, 2000 and
     incorporated by this reference.

(2)  Previously filed on Form 8-K filed with the Commission on April 26, 2000
     and incorporated by this   reference.

*    Filed herewith.




                                     II-2
<PAGE>

ITEM 17. UNDERTAKINGS.

     We hereby undertake:

     (1)  To file, during any period in which offers or sales are being made
     pursuant to this registration statement, a post-effective amendment to this
     registration statement to include any material information with respect to
     the plan of distribution not previously disclosed in the registration
     statement or any material change to such information in the registration
     statement;

     (2)  That, for the purpose of determining any liability under the
     Securities Act of 1933, each such post-effective amendment shall be deemed
     to be a new registration statement relating to the securities offered
     therein, and the offering of such securities at that time shall be deemed
     to be the initial bona fide offering thereof;

     (3)  To remove from registration by means of a post-effective amendment any
     of the securities being registered which remain unsold at the termination
     of the offering, and

     (4)  To deliver or cause to be delivered with the prospectus, to each
     person to whom the prospectus is sent or given, the latest annual report to
     security holders that is incorporated by reference in the prospectus and
     furnished pursuant to and meeting the requirements of Rule 14a-3 or Rule
     14c-3 under the Securities Exchange Act of 1934; and where interim
     financial information required to be presented by Article 3 of Regulation
     S-X are not set forth in the prospectus, to deliver, or cause to be
     delivered to each person to whom the prospectus is sent or given, the
     latest quarterly report that is specifically incorporated by reference in
     the prospectus to provide such interim financial information.

     We hereby undertake that, for purposes of determining any liability under
the Securities Act of 1933, each filing of the registrant's annual report
pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (and,
where applicable, each filing of an employee benefit plan's annual report
pursuant to Section 15(d) of the Securities Exchange Act of 1934) that is
incorporated by reference in the registration statement shall be deemed to be a
new registration statement relating to the securities offered therein, and the
offering of such securities at that time shall be deemed to be the initial bona
fide offering thereof.

     Insofar as indemnification by us for liabilities arising under the
Securities Act may be permitted to directors, officers and controlling persons
of American Technology Corporation pursuant to the provisions referenced above
or otherwise, we have been advised that in the opinion of the Commission such
indemnification is against public policy as expressed in the Securities Act of
1933, as amended, and is, therefore unenforceable. In the event that a claim for
indemnification against such liabilities (other than the payment by us of
expenses incurred or paid by a director, officer or controlling person of
American Technology Corporation in the successful defense of any action, suit or
proceeding) is asserted by such director, officer or controlling person in
connection with the securities being registered hereunder, we will, unless in
the opinion of its counsel the matter has been settled by controlling precedent,
submit to a court of appropriate jurisdiction the question whether such
indemnification by it is against public policy as expressed in the Securities
Act of 1933, as amended, and will be governed by the final adjudication of such
issue.




                                     II-3
<PAGE>

                                  SIGNATURES

     Pursuant to the requirements of the Securities Act of 1933, the registrant
certifies that it has reasonable grounds to believe that it meets all of the
requirements for filing on Form S-3 and has duly caused this registration
statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of San Diego, State of California, on April 28, 2000.

AMERICAN TECHNOLOGY CORPORATION

By:  /s/ Cornelius J. Brosnan
     ---------------------------------
     Cornelius J. Brosnan
     Chairman, Chief Executive Officer
     and President










                                     II-4
<PAGE>

                               POWER OF ATTORNEY

     KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature
appears below constitutes and appoints Cornelius J. Brosnan and Renee Warden and
each of them, his true and lawful attorney-in-fact and agent, with full power of
substitution and resubstitution, for him and in his name, place and stead, in
any and all capacities, to sign any and all amendments (including post-effective
amendments) to this registration statement, and to file the same, with all
exhibits thereto, and other documents in connection therewith, with the
Securities and Exchange Commission, granting unto said attorneys-in-fact and
agents, and each of them, full power and authority to do and perform each and
every act and thing requisite and necessary to be done in connection therewith,
as fully to all intents and purposes as he might or could do in person, hereby
ratifying and confirming all that said attorney-in-fact and agent, or any of
them, or his substitutes or substitute, may lawfully do or cause to be done by
virtue hereof.

     Pursuant to the requirements of the Securities Act of 1933, this
registration statement has been signed by the following persons in the
capacities and on the dates indicated.

<TABLE>
<CAPTION>


Signature                                        Title                               Date
- ---------                                        -----                               ----
<S>                             <C>                                             <C>
/s/ Cornelius J. Brosnan        Chairman, President, Chief Executive            April 28, 2000
- -----------------------------
Cornelius J. Brosnan            Officer (Principal Executive Officer),
                                and Director


/s/ Renee Warden                Chief Accounting Officer, Treasurer             April 28, 2000
- -----------------------------
Renee Warden                    and Secretary (Principal Financial
                                and Accounting Officer)


/s/ Elwood G. Norris            Chief Technology Officer and Director           April 28, 2000
- -----------------------------
Elwood G. Norris


/s/ Richard M. Wagner           Director                                        April 28, 2000
- -----------------------------
Richard M. Wagner

/s/ David J. Carter             Director                                        April 28, 2000
- -----------------------------
David J. Carter

/s/ O'Connell J. Benjamin       Director                                        April 28, 2000
- -----------------------------
O'Connell J. Benjamin
</TABLE>




                                     II-5
<PAGE>

                                 EXHIBIT INDEX

Exhibit No.      Description
- -----------      -----------

3.1              Corrected Certificate of Designation of Series C Preferred
                 stock filed with Delaware on April 19, 2000.(1)

4.1              Form of Warrant Agreement between the registrant and certain
                 investors dated March 16, 2000.(1)

5.1              Opinion of Procopio, Cory, Hargreaves & Savitch LLP.

10.1             Form of Series C Preferred Stock and Warrant Purchase Agreement
                 between the registrant and certain investors dated March 14,
                 2000.*

10.2             Asset Purchase Agreement between the registrant, Hucon Limited,
                 Stephen M. Williams and David Graebener dated April 11, 2000.
                 (Schedules to this exhibit have been omitted as permitted by
                 Item 601 of Regulation S-K.)(2)


23.1             Consent of BDO Seidman, LLP, independent certified public
                 accountants.*

23.2             Consent of Procopio, Cory, Hargreaves & Savitch LLP
                 Reference is made to Exhibit 5.1.*

24.1             Power of Attorney. Reference is made to Page II-5.




- ---------------------------
(1)  Previously filed on Form 8-K with the Commission on April 19, 2000 and
     incorporated by this reference.

(2)  Previously filed on Form 8-K filed with the Commission on April 26, 2000
     and incorporated by this   reference.

*    Filed herewith.




                                     II-6

<PAGE>

                                  EXHIBIT 5.1

       [OPINION AND CONSENT OF PROCOPIO, CORY, HARGREAVES & SAVITCH LLP]



                                  May 1, 2000



American Technology Corporation
13114 Evening Creek Drive South
San Diego, CA 92128


Ladies and Gentlemen:


     You have requested our opinion with respect to certain matters in
connection with the filing by American Technology Corporation, a Delaware
corporation (the "Company"), of a Registration Statement on Form S-3 (the
"Registration Statement") with the Securities and Exchange Commission, including
a related prospectus filed with the Registration Statement (the "Prospectus")
covering the registration of up to 1,733,878 shares of the Company's common
stock, $.00001 par value (the "Common Stock"), on behalf of certain selling
stockholders including: (i) 200,000 shares of issued and outstanding Common
Stock (the "Shares"); (ii) 1,733,878 shares of the Common Stock issuable upon
conversion of issued and outstanding Series C Preferred Stock (the "Conversion
Shares"); and (iii) 300,000 shares of the Common Stock (the "Warrant Shares")
issuable upon the exercise of certain issued and outstanding warrants
("Warrants").  This opinion is being furnished in accordance with the
requirements of Item 601(b)(5)(i) of Regulation S-K.

     In connection with this opinion, we have examined and relied upon the
Registration Statement, and related Prospectus, the Certificate of Amendment to
Certificate of Incorporation, the Corrected Certificate of Designation of Series
C Preferred Stock ("Certificate of Designation") and the Company's Bylaws, as
amended, the Warrants, the corporate proceedings taken by the Company in
connection with the issuance of the Series C Preferred Stock and the Warrants,
and the originals or copies certified to our satisfaction of such records,
documents, certificates, memoranda and other instruments as in our judgment are
necessary or appropriate to enable us to render the opinion expressed below.  We
have assumed the genuineness and authenticity of all documents submitted to us
as originals, the conformity to originals of all documents submitted to us as
copies thereof and the due execution and delivery of all documents where due
execution and delivery are a prerequisite to the effectiveness thereof.

     On the basis of the foregoing, and in reliance thereon, we are of the
opinion that (i) the Shares are validly issued, fully paid and non-assessable;
(ii) the Conversion Shares, when issued in accordance with the Certificate of
Designation will be validly issued, fully paid, and non-assessable; and (iii)
the Warrant Shares, when issued and sold in accordance with the terms of the
Warrants, will be validly issued, fully paid and non-assessable.

     We consent to the reference to our firm under the caption "Legal Matters"
in the Prospectus included in the Registration Statement and to the filing of
this opinion as Exhibit 5 to the Registration Statement.
<PAGE>

     This opinion letter is rendered as of the date first written above and we
disclaim any obligation to advise you of facts, circumstances, events or
developments which hereafter may be brought to our attention and which may
alter, affect or modify the opinion expressed herein.  Our opinion is expressly
limited to the matters set forth above and we render no opinion, whether by
implication or otherwise, as to any other matters relating to the Company, the
Shares, the Certificate of Designation, the Conversion Shares, the Warrants, or
the Warrant  Shares.

                             Very truly yours,

                             PROCOPIO, CORY, HARGREAVES & SAVITCH LLP

<PAGE>

                                                                    EXHIBIT 10.1

                              AMERICAN TECHNOLOGY
                                  CORPORATION


            SERIES C PREFERRED STOCK AND WARRANT PURCHASE AGREEMENT
<PAGE>

                               Table Of Contents


                                                                  PAGE
1.   AGREEMENT TO SELL AND PURCHASE..............................   1
     1.1   Authorization of Shares...............................   1
     1.2   Sale and Purchase.....................................   1
2.   CLOSING, DELIVERY AND PAYMENT...............................   2
     2.1   Closing...............................................   2
     2.2   Delivery..............................................   2
     2.3   Subsequent Sales of Shares............................   2
3.   REPRESENTATIONS, WARRANTIES AND COVENANTS OF THE COMPANY....   2
     3.1   Organization, Good Standing and Qualification.........   3
     3.2   Subsidiaries..........................................   3
     3.3   Capitalization; Voting Rights.........................   3
     3.4   Authorization; Binding Obligations....................   4
     3.5   SEC Reports and Filings...............................   4
     3.6   Changes...............................................   4
     3.7   Title to Properties and Assets; Liens, etc............   4
     3.8   Compliance with Other Instruments.....................   5
     3.9   Litigation............................................   5
     3.10  Employees.............................................   5
     3.11  Registration Rights...................................   5
     3.12  Compliance with Laws; Permits.........................   5
     3.13  Patents and Trademarks................................   6
     3.14  Offering Valid........................................   6
     3.15  Eligibility for Form S-3..............................   7
     3.16  Reporting Status......................................   7
     3.17  OTC Bulletin Board....................................   7
4.   REPRESENTATIONS AND WARRANTIES OF THE PURCHASERS............   7
     4.1   Requisite Power and Authority.........................   7
     4.2   Investment Representations............................   7
5.   CONDITIONS TO CLOSING.......................................   9

                                 i.
<PAGE>
                               Table of Contents
                                  (continued)

                                                                  PAGE
     5.1   Conditions to Purchasers' Obligations at the Closing..   9
     5.2   Conditions to Obligations of the Company..............  10
6.   REGISTRATION RIGHTS.........................................  10
     6.1   Definitions...........................................  10
     6.2   Mandatory Registration................................  11
     6.3   Expenses of Registration..............................  12
     6.4   Obligations of the Company............................  12
     6.5   Obligations of Holder.................................  13
     6.6   Indemnification.......................................  14
     6.7   Assignment of Registration Rights.....................  16
7.   MISCELLANEOUS...............................................  16
     7.1   Governing Law.........................................  16
     7.2   Survival..............................................  16
     7.3   Successors and Assigns................................  16
     7.4   Entire Agreement......................................  16
     7.5   Severability..........................................  16
     7.6   Amendment and Waiver..................................  17
     7.7   Delays or Omissions...................................  17
     7.8   Notices...............................................  17
     7.9   Expenses..............................................  17
     7.10  Attorneys' Fees.......................................  17
     7.11  Confidentiality.......................................  18
     7.12  Titles and Subtitles..................................  18
     7.13  Counterparts..........................................  18
     7.14  Broker's Fees.........................................  18
     7.15  Exculpation Among Purchasers..........................  18
     7.16  Pronouns..............................................  18

                                      ii
<PAGE>

                               List of Exhibits

        Schedule of Purchasers                          Exhibit A

        Certificate of Designation                      Exhibit B

        Warrant Agreement                               Exhibit C

        Schedule of Exceptions                          Exhibit D

                                      iii
<PAGE>

                        AMERICAN TECHNOLOGY CORPORATION

            SERIES C PREFERRED STOCK AND WARRANT PURCHASE AGREEMENT

     This Series C Preferred Stock and Warrant Purchase Agreement (the
"Agreement") is entered into as of March  ____ 2000, by and among American
Technology Corporation, a Delaware corporation (the "Company"), and each of
those persons and entities, severally and not jointly, whose names are set forth
on the Schedule of Purchasers attached hereto as Exhibit A (which persons and
entities are hereinafter collectively referred to as "Purchasers" and each
individually as a "Purchaser").

                                    RECITALS

     WHEREAS, the Company has authorized the sale and issuance of an aggregate
of up to two hundred fifty thousand (250,000) shares of its Series C Preferred
Stock (the "Shares") and warrants to purchase an aggregate of up to two hundred
and fifty thousand (250,000) shares of its Common Stock (the "Warrants," and
together with the Shares, the "Securities");

     WHEREAS, Purchasers desire to purchase the Securities on the terms and
conditions set forth herein; and

     WHEREAS, the Company desires to issue and sell the Securities to Purchasers
on the terms and conditions set forth herein.

     NOW, THEREFORE, in consideration of the foregoing recitals and the mutual
promises hereinafter set forth, the parties hereto agree as follows:

     1.  AGREEMENT TO SELL AND PURCHASE.

          1.1  AUTHORIZATION OF SHARES.  On or prior to the Closing (as defined
in Section 2 below), the Company shall have authorized (i) the sale and issuance
to Purchasers of the Securities and (ii) the issuance of such shares of Common
Stock to be issued upon conversion or exercise, as the case may be, of the
Securities (the "Conversion Shares").  The Securities and the Conversion Shares
shall have the rights, preferences, privileges and restrictions set forth in the
Company's Certificate of Designations of Series C Preferred Stock, in the form
attached hereto as Exhibit B (the "Certificate of Designation") and in the
Company's Certificate of Incorporation (collectively, the "Charter").

          1.2  SALE AND PURCHASE.  Subject to the terms and conditions hereof,
at the Closing (as hereinafter defined) the Company hereby agrees to issue and
sell to each Purchaser, severally and not jointly, and each Purchaser agrees to
purchase from the Company, severally and not jointly, the number of Shares set
forth opposite such Purchaser's name on Exhibit A, at a purchase price of ten
dollars ($20.00) per share and a Warrant, in the form attached hereto as Exhibit
C, to purchase the number of shares of Common Stock set forth opposite such
Purchaser's name on Exhibit A.

                                       1.
<PAGE>

          2.   CLOSING, DELIVERY AND PAYMENT.   The closing of the sale and
purchase of the Securities under this Agreement (the "Closing") shall take place
at 10:00 a.m. on the date hereof, at the offices of Procopio, Cory, Hargreaves &
Savitch LLP, 530 B Street, Suite 2100, San Diego, California 92101, or at such
other time or place as the Company and Purchasers may mutually agree (such date
is hereinafter referred to as the "Closing Date").

          2.2  DELIVERY.

               (a) ESCROW. Each Purchaser shall pay the purchase price for the
Securities as set forth next to such Purchaser's name on Exhibit A hereto by
delivering immediately available funds in United States Dollars, along with an
executed Stock Purchase Agreements , to the Company offices.  The Company shall
deliver certificates for the Shares and Warrants, registered in the name of such
Purchaser, to the Purchaser.

               (b) METHOD OF PAYMENT. Payment of the purchase price for the
Securities shall be made by wire transfer of funds to:

               Scripps Bank
               ABA#: 122240502
               Credit: American Technology Corporation
               A/C# 333501205

          2.3  SUBSEQUENT SALES OF SHARES.  At any time on or before the 60th
day following the Closing, the Company may sell up to the balance of the
authorized shares of Series C Preferred Stock and Warrants not sold at the
Closing to such persons as may be approved by the Board of Directors of the
Company.  All such sales shall be made on the terms and conditions set forth in
this Agreement, including, without limitation, the representations and
warranties by such Purchasers as set forth in Section 4.  Any Shares of Series C
Preferred Stock sold pursuant to this Section 2.3 shall be deemed to be "Shares"
for all purposes under this Agreement, any Warrants sold pursuant to this
Section 2.3 shall be deemed "Warrants" for all purposes under this Agreement,
and any purchasers thereof shall be deemed to be "Purchasers" for all purposes
under this Agreement.

     3.  REPRESENTATIONS, WARRANTIES AND COVENANTS OF THE COMPANY.

     Except as set forth in the Schedule of Exceptions attached hereto as
Exhibit D, the Company hereby represents and warrants to, and covenants with,
each Purchaser as of the date of this Agreement as follows:

          3.1  ORGANIZATION, GOOD STANDING AND QUALIFICATION. The Company is a
corporation duly organized, validly existing and in good standing under the laws
of the State of Delaware.  The Company has all requisite corporate power and
authority to own and operate its properties and assets, to execute and deliver
this Agreement and the Warrants to issue and sell the Securities and the
Conversion Shares and to carry out the provisions of this Agreement, the
Warrants and the Charter and to carry on its business as presently conducted and
as presently

                                       2.
<PAGE>

proposed to be conducted. The Company is duly qualified and is authorized to do
business and is in good standing as a foreign corporation in all jurisdictions
in which the nature of its activities and of its properties (both owned and
leased) makes such qualification necessary, except for those jurisdictions in
which failure to do so would not have a material adverse effect on the Company
or its business.

          3.2  SUBSIDIARIES.  The Company owns no equity securities of any other
corporation, limited partnership or similar entity.  The Company is not a
participant in any joint venture, partnership or similar arrangement.

          3.3  CAPITALIZATION; VOTING RIGHTS.  The authorized capital stock of
the Company consists of 20,000,000 shares of Common Stock, par value $.00001 per
share, 11,765,570 shares of which were issued and outstanding on February 28,
2000, 1,536,633 shares which are subject to outstanding options, 605,735 shares
of which are reserved for future issuance to employees, directors and
consultants pursuant to the Company's stock option plans, 532,000 shares of
which are subject to outstanding warrants, and 5,000,000 shares of Preferred
Stock, par value $.00001 per share,  350,000 of which are designated Series A
Preferred Stock, none of which are issued and outstanding, 250,000 of which are
designated as Series B Preferred Stock, and, as of February 28, 2000, 192,260 of
which are issued and outstanding, and which are convertible into 411,553 shares
of Common Stock,  and 250,000 of which are designated Series C Preferred Stock,
none of which, prior to the Closing, are issued and outstanding.  All issued and
outstanding shares of the Company's Common Stock (a) have been duly authorized
and validly issued, and (b) are fully paid and nonassessable.  The rights,
preferences, privileges and restrictions of the Shares are as stated in the
Charter.  1,119,565 shares of Common Stock have been duly and validly reserved
for issuance as Conversion Shares, and the Company will take all reasonable
measures to ensure that, at all times, a sufficient number of shares of its
Common Stock are reserved for issuance upon conversion of the Shares and
exercise of the Warrants.  As of February 28, 2000, other than the 605,735
shares reserved for issuance under the Company's stock option and stock
compensation plans, 1,536,633 shares subject to outstanding options and 532,000
shares subject to outstanding warrants and except as may be granted pursuant to
this Agreement or the Warrants, there are no outstanding options, warrants,
rights (including conversion, anti-dilution or preemptive rights and rights of
first refusal), proxy or stockholder agreements, or agreements of any kind for
the purchase or acquisition from the Company of any of its securities.  When
issued in compliance with the provisions of this Agreement and the Charter, the
Securities and the Conversion Shares will be validly issued, fully paid and
nonassessable, and will be free of any liens or encumbrances; provided, however,
that the Shares and the Conversion Shares may be subject to restrictions on
transfer under state and/or federal securities laws as set forth herein or as
otherwise required by such laws at the time a transfer is proposed.

          3.4  AUTHORIZATION; BINDING OBLIGATIONS.  All corporate action on the
part of the Company, its officers, directors and stockholders necessary for the
authorization of this Agreement and the Warrants, the performance of all
obligations of the Company hereunder and thereunder at the Closing and the
authorization, sale, issuance and delivery of the Securities pursuant hereto and
the Conversion Shares pursuant to the Charter has been taken or will be taken
prior to the Closing.  The Agreement, and the Warrants, when executed and
delivered, will

                                       3.
<PAGE>

be valid and binding obligations of the Company enforceable in accordance with
their terms, except (a) as limited by applicable bankruptcy, insolvency,
reorganization, moratorium or other laws of general application affecting
enforcement of creditors' rights; (b) general principles of equity that restrict
the availability of equitable remedies; and (c) to the extent that the
enforceability of the indemnification provisions in Section 6.6 of this
Agreement may be limited by applicable laws. The sale of the Securities and the
subsequent conversion or exercise of the Securities, as the case may be, into
Conversion Shares are not and will not be subject to any preemptive rights,
anti-dilution or rights of first refusal that have not been properly waived or
complied with.

          3.5  SEC REPORTS AND FILINGS.  The Company has delivered to Purchaser
a complete and accurate copy of the Annual Report on Form 10-K for the fiscal
year ended September 30, 1999, and the Quarterly Report on Form 10-Q for the
quarter ended December 31, 1999 filed by the Company with the Securities and
Exchange Commission ("SEC") (the "SEC Documents").  The SEC Documents, including
the financial statements contained therein, (i) complied with the requirements
of the Securities Act of 1933, as amended (the "Securities Act") or the
Securities Exchange Act of 1934, as amended (the "Exchange Act"), as the case
may be, at and as of the times they were filed (or, if amended or superseded by
a filing prior to the date of this Agreement, then on the date of such filing)
in all material respects and (ii) did not at and as of the time they were filed
(or, if amended or superseded by a filing prior to the date of this Agreement,
then on the date of such filing) contain any untrue statement of a material fact
or omit to state a material fact required to be stated therein or necessary in
order to make the statements therein, in light of the circumstances under which
they were made, not misleading.  The Company has made all filings with the SEC
required under the Securities Act, the Exchange Act and all regulations
promulgated thereunder since January 1, 1997.

          3.6  CHANGES.  Since January 1, 2000, there has been no material
adverse change or disruption in the business, operations, prospects or financial
condition of the Company other than as disclosed in the SEC Documents.

          3.7  TITLE TO PROPERTIES AND ASSETS; LIENS, ETC.  The Company has good
and marketable title to its properties and assets, including the properties and
assets reflected in the most recent balance sheet included in the SEC Documents,
and good title to its leasehold estates, in each case subject to no mortgage,
pledge, lien, lease, encumbrance or charge, other than (a) those resulting from
taxes which have not yet become delinquent, (b) minor liens and encumbrances
which do not materially detract from the value of the property subject thereto
or materially impair the operations of the Company, and (c) those that have
otherwise arisen in the ordinary course of business.  All facilities, machinery,
equipment, fixtures, vehicles and other properties owned, leased or used by the
Company are in good operating condition and repair and are reasonably fit and
usable for the purposes for which they are being used.  The Company is in
compliance with all material terms of each lease to which it is a party or is
otherwise bound.

          3.8  COMPLIANCE WITH OTHER INSTRUMENTS.  The Company is not in
violation or default of any term of its Charter or Bylaws, or of any provision
of any mortgage, indenture, contract, agreement, instrument or contract to which
it is party or by which it is bound or of any judgment, decree, order, writ or,
to its knowledge, any statute, rule or regulation applicable to the

                                       4.
<PAGE>

Company which would materially and adversely affect the business, assets,
liabilities, financial condition or operations of the Company. The execution,
delivery, and performance of and compliance with this Agreement, and the
Warrants, and the issuance and sale of the Securities pursuant hereto and of the
Conversion Shares pursuant to the Certificate of Designations and the Charter,
will not, with or without the passage of time or giving of notice, result in any
such material violation, or be in conflict with or constitute a default under
any such term, or result in the creation of any mortgage, pledge, lien,
encumbrance or charge upon any of the properties or assets of the Company or the
suspension, revocation, impairment, forfeiture or nonrenewal of any permit
license, authorization or approval applicable to the Company, its business or
operations or any of its assets or properties.

          3.9   LITIGATION.  There is no action, suit, proceeding or
investigation pending or to the Company's knowledge currently threatened in
writing against the Company that questions the validity of this Agreement or the
Warrants or the right of the Company to enter into any of such agreements, or to
consummate the transactions contemplated hereby or thereby, or which might
result, either individually or in the aggregate, in any material adverse change
in the assets,  prospects, condition or affairs of the Company, financially or
otherwise, or any change in the current equity ownership of the Company, nor is
the Company aware that there is any basis for the foregoing.

          3.10  EMPLOYEES.  The Company has no collective bargaining agreements
with any of its employees.  There is no labor union organizing activity pending
or, to the Company's knowledge, threatened with respect to the Company.

          3.11  REGISTRATION RIGHTS.  Except as required pursuant to this
Agreement and pursuant to the terms of Stock Purchase Warrant Agreements with
Renwick Corporate Finance dated February 5, 1997, Jonathan Berg dated May 13,
1998, and L.H. Friend & Co. dated June 18, 1998, and the Stock Purchase and
Warrant Agreements with Series B Shareholders dated December 1998, the Company
is presently not under any obligation, and has not granted any rights, to
register (as defined in Section 6.1 of this Agreement) any of the Company's
presently outstanding securities or any of its securities that may hereafter be
issued.

          3.12  COMPLIANCE WITH LAWS; PERMITS.  To its knowledge, the Company is
not in violation of any applicable statute, rule, regulation, order or
restriction of any domestic or foreign government or any instrumentality or
agency thereof or any administrative or self-regulatory agency in respect of the
conduct of its business or the ownership of its properties which violation would
materially and adversely affect the business, assets, liabilities, financial
condition or operations of the Company.  No orders, permissions, consents,
approvals or authorizations are required to be obtained and no registrations or
declarations are required to be filed in connection with the execution and
delivery of this Agreement and the issuance of the Securities or the Conversion
Shares, except such as has been duly and validly obtained or filed, or with
respect to any filings that must be made after the Closing, as will be filed in
a timely manner.  The Company has all franchises, permits, licenses and any
similar authority necessary for the conduct of its business as now being
conducted by it, the lack of which could materially and adversely affect the
business, properties, prospects or financial condition of the Company

                                       5.
<PAGE>

and believes it can obtain, without undue burden or expense, any similar
authority for the conduct of its business as planned to be conducted.

          3.13  PATENTS AND TRADEMARKS.   To the best of its knowledge, the
Company owns or possesses sufficient legal rights to all patents, trademarks,
service marks, trade names, copyrights, trade secrets, information and other
proprietary rights and processes necessary for its business as now conducted and
as proposed to be conducted, without any known infringement of the rights of
others.  There are no outstanding options, licenses or agreements of any kind
relating to the foregoing, nor is the Company bound by or a party to any
options, licenses or agreements of any kind with respect to the patents,
trademarks, service marks, trade names, copyrights, trade secrets, licenses,
information and other proprietary rights and processes of any other person or
entity other than such licenses or agreements arising from the purchase of "off
the shelf" or standard products.  The Company has not received any
communications alleging that the Company has violated or, by conducting its
business as proposed, would violate any of the patents, trademarks, service
marks, trade names, copyrights or trade secrets or other proprietary rights of
any other person or entity.  The Company is not aware that any of its employees
is obligated under any contract (including licenses, covenants or commitments of
any nature) or other agreement, or subject to any judgment, decree or order of
any court or administrative agency, that would interfere with their duties to
the Company or that would conflict with the Company's business as proposed to be
conducted.  Neither the execution nor delivery of this Agreement, nor the
carrying on of the Company's business by the employees of the Company, nor the
conduct of the Company's business as proposed, will, to the Company's knowledge,
conflict with or result in a breach of the terms, conditions or provisions of,
or constitute a default under, any contract, covenant or instrument under which
any employee is now obligated.  The Company does not believe it is or will be
necessary to utilize any inventions, trade secrets or proprietary information of
any of its employees made prior to their employment by the Company, except for
inventions, trade secrets or proprietary information that have been assigned to
the Company.

          3.14  OFFERING VALID.  Assuming the accuracy of the representations
and warranties of the Purchasers contained in Section 4.2 hereof, the offer,
sale and issuance of the Securities and the Conversion Shares will be exempt
from the registration requirements of the Securities Act and will have been
registered or qualified (or are exempt from registration and qualification)
under the registration, permit or qualification requirements of all applicable
state securities laws.  Neither the Company nor any agent on its behalf has
solicited or will solicit any offers to sell or has offered to sell or will
offer to sell all or any part of the Securities to any person or persons so as
to bring the sale of such Securities by the Company within the registration
provisions of the Securities Act or any state securities laws.

          3.15  ELIGIBILITY FOR FORM S-3.   The Company represents and warrants
that it meets the requirements for the use of Form S-3 for registration of the
sale by the Purchaser of the Conversion Shares, and the Company shall file all
reports required to be filed by the Company with the SEC in a timely manner and
take all other necessary action so as to maintain such eligibility for the use
of Form S-3.

                                       6.
<PAGE>

          3.16  REPORTING STATUS.  The Company's Common Stock is registered
under Section 12 of the Exchange Act.  So long as any Purchaser beneficially
owns any of the Securities or Conversion Shares, the Company shall timely file
all reports required to be filed with the SEC pursuant to the Exchange Act, and
the Company shall not voluntarily terminate its status as an issuer required to
file reports under the Exchange Act even if the Exchange Act or the rules and
regulations thereunder would permit such termination.

          3.17  NASDAQ SMALL CAP MARKET.  The Company's Common Stock is listed
on the Nasdaq Small Cap Market maintained by the National Association of
Securities Dealers, Inc. ("NASD"), and for so long as any Purchaser owns any of
the Securities or Conversion Shares, the Company shall use its best efforts to
continue the listing and trading of its Common Stock on the Nasdaq SmallCap
Market or to secure and maintain listing and trading on the Nasdaq National
Market System, the New York Stock Exchange or the American Stock Exchange, and
shall comply in all respects with the Company's reporting filing and other
obligations under the bylaws or rules of such market or exchange.  The Company
is not aware of any delisting or suspension proceeding regarding its Common
Stock or any SEC or NASD inquiries regarding the Company and does not reasonably
anticipate any such delisting, suspension or inquiry.

     4.   REPRESENTATIONS AND WARRANTIES OF THE PURCHASERS.

     Each Purchaser hereby represents and warrants, severally and not jointly,
to the Company as follows:

          4.1   REQUISITE POWER AND AUTHORITY. Purchaser has all necessary power
and authority under all applicable provisions of law to execute and deliver this
Agreement and to carry out its provisions. All action on Purchaser's part
required for the lawful execution and delivery of this Agreement has been or
will be effectively taken prior to the Closing. Upon its execution and delivery,
this Agreement will be a valid and binding obligation of Purchaser, enforceable
in accordance with its terms, except (a) as limited by applicable bankruptcy,
insolvency, reorganization, moratorium or other laws of general application
affecting enforcement of creditors' rights, (b) general principles of equity
that restrict the availability of equitable remedies, and (c) to the extent that
the enforceability of the indemnification provisions of Section 6.6 of this
Agreement may be limited by applicable laws.

          4.2   INVESTMENT REPRESENTATIONS.  Purchaser understands that neither
the Securities nor the Conversion Shares have been registered under the
Securities Act.  Purchaser also understands that the Securities are being
offered and sold pursuant to an exemption from registration contained in the
Securities Act based in part upon Purchaser's representations contained in the
Agreement.  Purchaser hereby represents and warrants as follows:

                (a) PURCHASER BEARS ECONOMIC RISK.  Purchaser has substantial
experience in evaluating and investing in private placement transactions of
securities in companies similar to the Company so that it is capable of
evaluating the merits and risks of its investment in the Company and has the
capacity to protect its own interests.  Purchaser must bear the economic risk of
this investment indefinitely unless the Securities (or the Conversion Shares)

                                       7.
<PAGE>

are registered pursuant to the Securities Act, or an exemption from registration
is available.  Purchaser understands that other than pursuant to the terms of
this Agreement the Company has no present intention of registering the
Securities, the Conversion Shares or any shares of its Common Stock.  Purchaser
also understands that there is no assurance that any exemption from registration
under the Securities Act will be available and that, even if available, such
exemption may not allow Purchaser to transfer all or any portion of the
Securities or the Conversion Shares under the circumstances, in the amounts or
at the times Purchaser might propose.

               (b) ACQUISITION FOR OWN ACCOUNT.  Purchaser is acquiring the
Securities and the Conversion Shares for Purchaser's own account for investment
only, and not with a present view towards their distribution other than in
compliance with the Securities Act.

               (c) PURCHASER CAN PROTECT ITS INTEREST. Purchaser represents that
by reason of its, or of its management's, business or financial experience,
Purchaser has the capacity to protect its own interests in connection with the
transactions contemplated in this Agreement. Further, Purchaser is aware of no
publication of any advertisement in connection with the transactions
contemplated in the Agreement.

               (d) ACCREDITED INVESTOR.  Purchaser represents that it is an
accredited investor within the meaning of Regulation D under the Securities Act.

               (e) COMPANY INFORMATION.  Purchaser has received and read the SEC
Documents and has had an opportunity to discuss the Company's business,
management and financial affairs with directors, officers and management of the
Company and has had the opportunity to review the Company's operations and
facilities.  Purchaser has also had the opportunity to ask questions of and
receive answers from, the Company and its management regarding the terms and
conditions of this investment.

               (f) RULE 144. Purchaser acknowledges and agrees that the
Securities, and, if issued, the Conversion Shares must be held indefinitely
unless they are subsequently registered under the Securities Act or an exemption
from such registration is available. Purchaser has been advised or is aware of
the provisions of Rule 144 promulgated under the Securities Act as in effect
from time to time, which permits limited resale of shares purchased in a private
placement subject to the satisfaction of certain conditions, including, among
other things: the availability of certain current public information about the
Company, the resale occurring following the required holding period under Rule
144 and (other than Rule 144(k)) the number of shares being sold during any
three-month period not exceeding specified limitations.

               (g) RESIDENCE. If the Purchaser is an individual, then the
Purchaser resides in the state or province identified in the address of the
Purchaser set forth on Exhibit A; if the Purchaser is a partnership,
corporation, limited liability company or other entity, then the office or
offices of the Purchaser in which its investment decision was made is located at
the address or addresses of the Purchaser set forth on Exhibit A.

                                       8.
<PAGE>

     5.   CONDITIONS TO CLOSING.

          5.1  CONDITIONS TO PURCHASERS' OBLIGATIONS AT THE CLOSING.
Purchasers' obligations to purchase the Securities at the Closing are subject to
the satisfaction, at or prior to the Closing Date, of the following conditions:

               (a) REPRESENTATIONS AND WARRANTIES TRUE; PERFORMANCE OF
OBLIGATIONS. The representations and warranties made by the Company in Section 3
hereof shall be true and correct in all material respects as of the Closing Date
with the same force and effect as if they had been made as of the Closing Date,
and the Company shall have performed all obligations and conditions herein
required to be performed or observed by it on or prior to the Closing.

               (b) LEGAL INVESTMENT. On the Closing Date, the sale and issuance
of the Securities and the proposed issuance of the Conversion Shares shall be
legally permitted by all laws and regulations to which Purchasers and the
Company are subject.

               (c) CONSENTS, PERMITS, AND WAIVERS. The Company shall have
obtained any and all consents, permits and waivers necessary or appropriate for
consummation of the transactions contemplated by the Agreement (except for such
as may be properly obtained subsequent to the Closing).

               (d) FILING OF CERTIFICATE OF DESIGNATION.  The Certificate of
Designation shall have been filed with the Secretary of State of the State of
Delaware with a copy provided to Purchasers.

               (e) RESERVATION OF CONVERSION SHARES. The Conversion Shares
issuable upon conversion of the Shares and exercise of the Warrants shall have
been duly authorized and reserved for issuance upon such conversion or exercise.

               (f) NASDAQ SMALL CAP MARKET.  The Company's Common Stock shall be
currently trading on the Nasdaq Small Cap Market.  The Company and Purchasers
shall not be aware of any delisting or suspension proceeding regarding the
Company's Common Stock or any SEC or NASD inquiries regarding the Company, nor
shall the Company or any Purchaser reasonably anticipate any such delisting,
suspension or inquiry.

               (g) SIZE OF OFFERING. Purchasers purchasing at least an aggregate
of $3,000,000 of the Securities pursuant to this Agreement shall have purchased,
or will be purchasing, such Securities prior to or concurrent with the Closing.

          5.2  CONDITIONS TO OBLIGATIONS OF THE COMPANY.  The Company's
obligation to issue and sell the Securities at the Closing is subject to the
satisfaction, on or prior to such Closing, of the following conditions:

               (a) REPRESENTATIONS AND WARRANTIES TRUE.  The representations and
warranties made by those Purchasers acquiring Securities in Section 4 hereof
shall be true and

                                       9.
<PAGE>

correct in all material respects at the date of the Closing, with the same force
and effect as if they had been made on and as of said date.

               (b) PERFORMANCE OF OBLIGATIONS. Such Purchasers shall have
performed and complied with all agreements and conditions herein required to be
performed or complied with by such Purchasers on or before the Closing.

               (c) FILING OF CERTIFICATE OF DESIGNATION.  The Certificate of
Designation shall have been filed with the Secretary of State of the State of
Delaware.

               (d) CONSENTS, PERMITS, AND WAIVERS. The Company shall have
obtained any and all consents, permits and waivers necessary or appropriate for
consummation of the transactions contemplated by the Agreement (except for such
as may be properly obtained subsequent to the Closing).

               (e) PAYMENT.  Each Purchaser shall have delivered to the Company
immediately available funds as payment in full of an amount equal to the
purchase price of the Securities as set forth next to such Purchaser's name on
Exhibit A hereto in accordance with Section 2.2 hereof.

     6.   REGISTRATION RIGHTS

          6.1  DEFINITIONS.  As used in this Section 6, the following terms
shall have the following respective meanings:

          "FORM S-3" means such form under the Securities Act as in effect on
the date hereof or any successor registration form under the Securities Act
subsequently adopted by the SEC which permits inclusion or incorporation of
substantial information by reference to other documents filed by the Company
with the SEC.

          "HOLDER" means any person owning of record Registrable Securities that
have not been sold to the public or any assignee of record of such Registrable
Securities in accordance with Section 6.7 hereof.

          "REGISTER," "REGISTERED," and "REGISTRATION" refer to a registration
effected by preparing and filing a registration statement in compliance with the
Securities Act, and the declaration or ordering of effectiveness of such
registration statement or document.

          "REGISTRABLE SECURITIES" means (a) Common Stock of the Company issued
or issuable upon conversion of the Shares; (b) Common Stock of the Company
issued or issuable upon exercise of the Warrants; and (c) any Common Stock of
the Company issued as (or issuable upon the conversion or exercise of any
warrant, right or other security which is issued as) a dividend or other
distribution with respect to, or in exchange for or in replacement of, such
above-described securities.  Notwithstanding the foregoing, Registrable
Securities shall not include (i) any Conversion Shares issued prior to the date
the Registration Statement covering such other Registrable Securities which is
required to be filed by the Company pursuant to the first sentence of Section
6.2(a) hereof is declared effective by the SEC, and (ii) any securities

                                      10.
<PAGE>

sold by a person to the public either pursuant to a registration statement or
Rule 144 or sold in a private transaction in which the transferor's rights under
this Section 6 are not assigned.

          "REGISTRABLE SECURITIES THEN OUTSTANDING" shall be the number of
shares determined by calculating the total number of shares of the Company's
Common Stock that are Registrable Securities and either (a) are then issued and
outstanding or (b) are issuable pursuant to then exercisable or convertible
securities.

          "REGISTRATION EXPENSES" shall mean all expenses incurred by the
Company in complying with this Section 6 hereof, including, without limitation,
all registration and filing fees, printing expenses, fees and disbursements of
counsel for the Company, blue sky fees and expenses and the expense of any
special audits incident to or required by any such registration (but excluding
the compensation of regular employees of the Company which shall be paid in any
event by the Company).

          "SEC" or "COMMISSION" means the Securities and Exchange Commission.

          "SELLING EXPENSES" shall mean all underwriting discounts and selling
commissions applicable to the sale.

          6.2  MANDATORY REGISTRATION.

               (a) The Company shall prepare and file with the SEC on or before
April 30, 2000 (the "SEC Filing Date") a Registration Statement on Form S-3 or,
if Form S-3 is not available, on another appropriate form reasonably acceptable
to the Investors, which covers the resale of a number of shares of Common Stock
equal to at least the number of Registrable Securities issuable to each Holder
upon conversion of the Shares and exercise of the Warrants, determined as if the
Shares were converted in full (based on an $5.75 per share conversion price) and
the Warrants were exercised in full on the first anniversary of the Closing
Date. If at any time the number of shares of Common Stock included in the
Registration Statement required to be filed as provided in the first sentence of
this Section 6.2(a) shall be insufficient to cover the number of shares of
Common Stock issuable on conversion in full of the unconverted Shares and
unexercised Warrants, then promptly, but in no event later than 60 days after
such insufficiency shall occur, the Company shall file with the SEC an
additional Registration Statement on Form S-3, or another appropriate form
(which shall not constitute a post-effective amendment to the Registration
Statement filed pursuant to the first sentence of this Section 6.2(a)) covering
such number of shares of Common Stock as shall be sufficient to permit such
conversion and exercise. For all purposes of this Agreement such additional
Registration Statement shall be deemed to be the Registration Statement required
to be filed by the Company pursuant to this Section 6.2(a), and the Company and
the Holders shall have the same rights and obligations with respect to such
additional Registration Statement as they shall have with respect to the initial
Registration statement required to be filed by the Company pursuant to this
Section 6.2(a).

               (b)  ADJUSTMENT OF CONVERSION TERMS. If the Registration
Statement covering the Registrable Securities which is required to be filed by
the Company pursuant to the first sentence of Section 6.2(a) hereof is not
effective by July 31, 2000, the terms of conversion

                                      11.
<PAGE>

of the Shares shall be adjusted as provided in the Certificate of Designation.

          6.3  EXPENSES OF REGISTRATION.  Except as specifically provided
herein, all Registration Expenses incurred in connection with any registration,
qualification or compliance pursuant to Section 6.2 shall be borne by the
Company.  All Selling Expenses incurred in connection with any registrations
hereunder, shall be borne by the holders of the securities so registered pro
rata on the basis of the number of shares so registered.

          6.4  OBLIGATIONS OF THE COMPANY.  Whenever required to effect the
registration of any Registrable Securities, the Company shall:

               (a) Prepare and file with the SEC a Registration Statement on
Form S-3 with respect to the number of Registrable Securities provided in
Section 6.2(a), and thereafter to use all reasonable efforts to cause each
Registration Statement relating to Registrable Securities to become effective
and keep the Registration Statement effective for two years after the Closing
Date.

               (b) Prepare and file with the SEC such amendments and supplements
to such registration statement and the prospectus used in connection with such
registration statement as may be necessary to comply with the provisions of the
Securities Act with respect to the disposition of all securities covered by such
registration statement for the period set forth in paragraph (a) above.

               (c) Furnish to the Holders such number of copies of a prospectus,
including a preliminary prospectus, in conformity with the requirements of the
Securities Act, and such other documents as they may reasonably request in order
to facilitate the disposition of Registrable Securities owned by them.

               (d) Use its reasonable best efforts to register and qualify the
securities covered by such registration statement under such other securities or
Blue Sky laws of such jurisdictions as shall be reasonably requested by the
Holders; provided that the Company shall not be required in connection therewith
or as a condition thereto to qualify to do business or to file a general consent
to service of process in any such states or jurisdictions.

               (e) Notify each Holder of Registrable Securities covered by such
registration statement at any time when a prospectus relating thereto is
required to be delivered under the Securities Act of the happening of any event
as a result of which the prospectus included in such registration statement, as
then in effect, includes an untrue statement of a material fact or omits to
state a material fact required to be stated therein or necessary to make the
statements therein not misleading in the light of the circumstances then
existing, and use its best efforts to prepare a supplement or amendment to the
Registration Statement to correct such untrue statement or omission, and deliver
such number of copies of such supplement or amendment to each Holder as such
Holder may reasonably request.

               (f) Use all reasonable efforts to prevent the issuance of stop
orders or any other suspensions in trading of the Company's Common Stock by the
SEC or any applicable

                                      12.
<PAGE>

exchange or market, and use its best efforts to have removed or reversed any
such stop order or suspension in trading that occurs.

          6.5  OBLIGATIONS OF HOLDER.

               (a) No Holder shall have any right to obtain or seek an
injunction restraining or otherwise delaying any such registration as the result
of any controversy that might arise with respect to the interpretation or
implementation of this Section 6.

               (b) It shall be a condition precedent to the obligations of the
Company to take any action pursuant to Section 6.2 or 6.4 that each Holder shall
furnish to the Company such information regarding itself, the Registrable
Securities held by it and the intended method of disposition of the Registrable
Securities held by it as shall be reasonably required to effect the registration
of such Registrable Securities and shall execute such documents in connection
with such registration as the Company may reasonably request.

               (c) Each Holder by such Holder's acceptance of the Registrable
Securities agrees to cooperate with the Company as reasonably requested by the
Company in connection with the preparation and filing of the Registration
Statement hereunder, unless such Holder has notified the Company in writing of
such Holder's election to waive all of such Holder's rights to register any
securities under this Section 6;

               (d) Each Holder agrees that, upon receipt of any notice from the
Company of the happening of any event of the kind described in Section 6.4(e),
such Holder will immediately discontinue disposition of Registrable Securities
pursuant to the Registration Statement covering such Registrable Securities
until such Holder's receipt of copies of a supplemented or amended prospectus
and, if so directed by the Company, such Holder shall deliver to the Company (at
the expense of the Company) or destroy (and deliver to the Company a certificate
of destruction) all copies in such Holder's possession, of the prospectus
covering such Registrable Securities current at the time of receipt of such
notice.

          6.6  INDEMNIFICATION. In the event any Registrable Securities are
included in a registration statement under this Section 6:

               (a) To the extent permitted by law, the Company will indemnify
and hold harmless each Holder, the partners, officers and directors of each
Holder, any underwriter (as defined in the Securities Act) for such Holder and
each person, if any, who controls such Holder or underwriter within the meaning
of the Securities Act or the Exchange Act, against any losses, claims, damages,
or liabilities (joint or several) to which they may become subject under the
Securities Act, the Exchange Act or other federal or state law, insofar as such
losses, claims, damages or liabilities (or actions in respect thereof) arise out
of or are based upon any of the following statements, omissions or violations
(collectively a "Violation") by the Company: (i) any untrue statement or alleged
untrue statement of a material fact contained in such registration statement,
including any preliminary prospectus or final prospectus contained therein or
any amendments or supplements thereto, (ii) the omission or alleged omission to
state therein a material fact required to be stated therein, or necessary to
make the statements therein not

                                      13.
<PAGE>

misleading, or (iii) any violation or alleged violation by the Company of the
Securities Act, the Exchange Act, any state securities law or any rule or
regulation promulgated under the Securities Act, the Exchange Act or any state
securities law in connection with the offering covered by such registration
statement; and the Company will pay as incurred to each such Holder, partner,
officer, director, underwriter or controlling person for any legal or other
expenses reasonably incurred by them in connection with investigating or
defending any such loss, claim, damage, liability or action; provided however,
that the indemnity agreement contained in this Section 6.6 shall not apply to
amounts paid in settlement of any such loss, claim, damage, liability or action
if such settlement is effected without the consent of the Company, which consent
shall not be unreasonably withheld, nor shall the Company be liable in any such
case for any such loss, claim, damage, liability or action to the extent that it
arises out of or is based upon a Violation which occurs in reliance upon and in
conformity with written information furnished expressly for use in connection
with such registration by such Holder, partner, officer, director, underwriter
or controlling person of such Holder.

               (b) To the extent permitted by law, each Holder will, if
Registrable Securities held by such Holder are included in the securities as to
which such registration qualifications or compliance is being effected,
indemnify and hold harmless the Company, each of its directors, its officers and
each person, if any, who controls the Company within the meaning of the
Securities Act, any underwriter and any other Holder selling securities under
such registration statement or any of such other Holder's partners, directors or
officers or any person who controls such Holder, against any losses, claims,
damages or liabilities (joint or several) to which the Company or any such
director, officer, controlling person, underwriter or other such Holder, or
partner, director, officer or controlling person of such other Holder may become
subject under the Securities Act, the Exchange Act or other federal or state
law, insofar as such losses, claims, damages or liabilities (or actions in
respect thereto) arise out of or are based upon any Violation, in each case to
the extent (and only to the extent) that such Violation occurs in reliance upon
and in conformity with written information furnished by such Holder under an
instrument duly executed by such Holder and stated to be specifically for use in
connection with such registration; and each such Holder will pay as incurred any
legal or other expenses reasonably incurred by the Company or any such director,
officer, controlling person, underwriter or other Holder, or partner, officer,
director or controlling person of such other Holder in connection with
investigating or defending any such loss, claim, damage, liability or action if
it is judicially determined that there was such a Violation; provided, however,
that the indemnity agreement contained in this Section 6.6 shall not apply to
amounts paid in settlement of any such loss, claim, damage, liability or action
if such settlement is effected without the consent of the Holder, which consent
shall not be unreasonably withheld; provided further, that in no event shall any
indemnity under this Section 6.6 exceed the proceeds from the offering received
by such Holder.

               (c) Promptly after receipt by an indemnified party under this
Section 6.6 of notice of the commencement of any action (including any
governmental action), such indemnified party will, if a claim in respect thereof
is to be made against any indemnifying party under this Section 6.6, deliver to
the indemnifying party a written notice of the commencement thereof and the
indemnifying party shall have the right to participate in, and, to the extent
the indemnifying party so desires, jointly with any other indemnifying party
similarly noticed, to

                                      14.
<PAGE>

assume the defense thereof with counsel mutually satisfactory to the parties;
provided, however, that an indemnified party shall have the right to retain its
own counsel, with the fees and expenses to be paid by the indemnifying party, if
representation of such indemnified party by the counsel retained by the
indemnifying party would be inappropriate due to actual or potential differing
interests between such indemnified party and any other party represented by such
counsel in such proceeding. The failure to deliver written notice to the
indemnifying party within a reasonable time of the commencement of any such
action, if materially prejudicial to its ability to defend such action, shall
relieve such indemnifying party of any liability to the indemnified party under
this Section 6.6, but the omission so to deliver written notice to the
indemnifying party will not relieve it of any liability that it may have to any
indemnified party otherwise than under this Section 6.6.

               (d) If the indemnification provided for in this Section 6.6 is
held by a court of competent jurisdiction to be unavailable to an indemnified
party with respect to any losses, claims, damages or liabilities referred to
herein, the indemnifying party, in lieu of indemnifying such indemnified party
thereunder, shall to the extent permitted by applicable law contribute to the
amount paid or payable by such indemnified party as a result of such loss,
claim, damage or liability in such proportion as is appropriate to reflect the
relative fault of the indemnifying party on the one hand and of the indemnified
party on the other in connection with the Violation(s) that resulted in such
loss, claim, damage or liability, as well as any other relevant equitable
considerations. The relative fault of the indemnifying party and of the
indemnified party shall be determined by a court of law by reference to, among
other things, whether the untrue or alleged untrue statement of a material fact
or the omission to state a material fact relates to information supplied by the
indemnifying party or by the indemnified party and the parties' relative intent,
knowledge, access to information and opportunity to correct or prevent such
statement or omission; provided, that in no event shall any contribution by a
Holder hereunder exceed the proceeds from the offering received by such Holder.

               (e) The obligations of the Company and Holders under this Section
6.6 shall survive completion of any offering of Registrable Securities in a
registration statement and the termination of this agreement. No indemnifying
party, in the defense of any such claim or litigation, shall, except with the
consent of each indemnified party, consent to entry of any judgment or enter
into any settlement which does not include as an unconditional term thereof the
giving by the claimant or plaintiff to such indemnified party of a release from
all liability in respect to such claim or litigation.

          6.7  ASSIGNMENT OF REGISTRATION RIGHTS.  The rights to cause the
Company to register Registrable Securities pursuant to this Section 6 may be
assigned by a Holder to a transferee or assignee of Registrable Securities which
(a) is a subsidiary, parent, general partner, limited partner, retired partner,
member or retired member of a Holder, (b) is a Holder's family member or trust
for the benefit of an individual Holder, or (c) acquires at least twenty-five
thousand (25,000) shares of Registrable Securities (as adjusted for stock splits
and combinations); provided, however, (i) the transferor shall, within ten (10)
days after such transfer, furnish to the Company written notice of the name and
address of such transferee or assignee and the securities with respect to which
such registration rights are being assigned and (ii) such transferee shall agree
to be subject to all restrictions set forth in this Agreement.

                                      15.
<PAGE>

     7.   MISCELLANEOUS.

          7.1  GOVERNING LAW.  This Agreement shall be governed in all respects
by the laws of the State of California as such laws are applied to agreements
between California residents entered into and performed entirely in California.

          7.2  SURVIVAL.  The representations, warranties, covenants and
agreements made herein shall survive any investigation made by any Purchaser and
the closing of the transactions contemplated hereby.  All statements as to
factual matters contained in any certificate or other instrument delivered by or
on behalf of the Company pursuant hereto in connection with the transactions
contemplated hereby shall be deemed to be representations and warranties by the
Company hereunder solely as of the date of such certificate or instrument.

          7.3  SUCCESSORS AND ASSIGNS.  Except as otherwise expressly provided
herein, the provisions hereof shall inure to the benefit of, and be binding
upon, the successors, assigns, heirs, executors and administrators of the
parties hereto and shall inure to the benefit of and be enforceable by each
person who shall be a holder of the Securities from time to time.

          7.4  ENTIRE AGREEMENT.  This Agreement, the Exhibits and Schedules
hereto, the Warrants and the other documents delivered pursuant hereto
constitute the full and entire understanding and agreement between the parties
with regard to the subjects hereof and no party shall be liable or bound to any
other in any manner by any representations, warranties, covenants and agreements
except as specifically set forth herein and therein.

          7.5  SEVERABILITY.  In case any provision of the Agreement shall be
invalid, illegal or unenforceable, the validity, legality and enforceability of
the remaining provisions shall not in any way be affected or impaired thereby.

          7.6  AMENDMENT AND WAIVER.

               (a) This Agreement may be amended or modified only upon the
written consent of the Company and holders of at least fifty percent (50%) of
the Shares (treated as if converted and including any Conversion Shares into
which the Shares or Warrants have been converted or exercised that have not been
sold to the public).

               (b) The obligations of the Company and the rights of the holders
of the Shares, the Warrants and the Conversion Shares under the Agreement may be
waived only with the written consent of the holders of at least fifty percent
(50%) of the Shares (treated as if converted and including any Conversion Shares
into which the Shares or Warrants have been converted or exercised that have not
been sold to the public).

          7.7  DELAYS OR OMISSIONS.  It is agreed that no delay or omission to
exercise any right, power or remedy accruing to any party, upon any breach,
default or noncompliance  by another party under this Agreement or the Charter,
shall impair any such right, power or remedy, nor shall it be construed to be a
waiver of any such breach, default or noncompliance, or any acquiescence
therein, or of or in any similar breach, default or noncompliance thereafter
occurring. It is further agreed that any waiver, permit, consent or approval of
any kind or

                                      16.
<PAGE>

character on any Purchaser's part of any breach, default or noncompliance under
this Agreement or under the Charter or any waiver on such party's part of any
provisions or conditions of the Agreement or the Charter must be in writing and
shall be effective only to the extent specifically set forth in such writing.
All remedies, either under this Agreement, the Charter by law, or otherwise
afforded to any party, shall be cumulative and not alternative.

          7.8  NOTICES.  All notices required or permitted hereunder shall be in
writing and shall be deemed effectively given: (a) upon personal delivery to the
party to be notified; (b) when sent by confirmed telex or facsimile if sent
during normal business hours of the recipient, if not, then on the next business
day; (c) five (5) days after having been sent by registered or certified mail,
return receipt requested, postage prepaid; or (d) one (1) day after deposit with
a nationally recognized overnight courier, specifying next day delivery, with
written verification of receipt.  All communications shall be sent to the
Company at the address as set forth on the signature page hereof and to
Purchaser at the address set forth on Exhibit A attached hereto or at such other
address as the Company or Purchaser may designate by ten (10) days advance
written notice to the other parties hereto.

          7.9  EXPENSES.  Each party shall pay all costs and expenses that it
incurs with respect to the negotiation, execution, delivery and performance of
this Agreement and the Warrants.

          7.10  ATTORNEYS' FEES.  In the event that any dispute among the
parties to this Agreement should result in litigation, the prevailing party in
such dispute shall be entitled to recover from the losing party all fees, costs
and expenses of enforcing any right of such prevailing party under or with
respect to this Agreement, including without limitation, such reasonable fees
and expenses of attorneys and accountants, which shall include, without
limitation, all fees, costs and expenses of appeals.

          7.11  CONFIDENTIALITY.   The Company shall not publicly disclose the
name or identity of any Purchaser unless (i) required by law or the rules and
regulations of the SEC, (ii) such Purchaser has given its prior written consent
or (iii) such information is already in the public domain.

          7.12  TITLES AND SUBTITLES.  The titles of the sections and
subsections of the Agreement are for convenience of reference only and are not
to be considered in construing this Agreement.

          7.13  COUNTERPARTS.  This Agreement may be executed in any number of
counterparts, by facsimile, or both, each of which shall be an original, but all
of which together shall constitute one instrument.

          7.14  BROKER'S FEES.  Each party hereto represents and warrants that
no agent, broker, investment banker, person or firm acting on behalf of or under
the authority of such party hereto is or will be entitled to any broker's or
finder's fee or any other commission directly or indirectly in connection with
the transactions contemplated herein.  Each party hereto further

                                      17.
<PAGE>

agrees to indemnify each other party for any claims, losses or expenses incurred
by such other party as a result of the representation in this Section 7.13 being
untrue.

          7.15  EXCULPATION AMONG PURCHASERS.  Each Purchaser acknowledges that
it is not relying upon any person, firm, or corporation, other than the Company
and its officers and directors, in making its investment or decision to invest
in the Company.  Each Purchaser agrees that no Purchaser nor the respective
controlling persons, officers, directors, partners, agents, or employees of any
Purchaser shall be liable for any action heretofore or hereafter taken or
omitted to be taken by any of them in connection with the Securities and
Conversion Shares.

          7.16  PRONOUNS.  All pronouns contained herein, and any variations
thereof, shall be deemed to refer to the masculine, feminine or neutral,
singular or plural, as to the identity of the parties hereto may require.

                                      18.
<PAGE>

     IN WITNESS WHEREOF, the parties hereto have executed the SERIES C PREFERRED
STOCK AND WARRANT PURCHASE AGREEMENT as of the date set forth in the first
paragraph hereof.

COMPANY:                                PURCHASER:

American Technology Corporation         /s/ Purchaser
13114 Evening Creek Drive South         ----------------------------------
San Diego, California  92128            [PRINT NAME OF PURCHASER]


By: /s/ Renee Warden                    By:
   ------------------------------          -------------------------------
     Renee Warden
     Secretary
                                        Title:
                                              ----------------------------

                                      19.
<PAGE>

            SERIES C PREFERRED STOCK AND WARRANT PURCHASE AGREEMENT

                                   Exhibit A


                                                        Shares of
                        Aggregate                      Common Stock
                        Purchase                        Underlying
Name and Address          Price           Shares         Warrant
- ----------------        ---------         ------       ------------










Total:                  ---------         ------       ------------


                                      20.
<PAGE>

                                   Exhibit D

                            SCHEDULE OF EXCEPTIONS



SECTION 3.2   The Company has entered into a letter of intent with regard to a
new audio technology that may require the issuance of up to 400,000 shares of
the Company's Common Stock, and these shares would have registration rights.

SECTION 3.3   SEE 3.2 ABOVE.

SECTION 3.11  SEE 3.2 ABOVE.

                                      21.

<PAGE>

                                 EXHIBIT 23.1



                            CONSENT OF INDEPENDENT
                         CERTIFIED PUBLIC ACCOUNTANTS


American Technology Corporation
San Diego, California

We hereby consent to the incorporation by reference in the Prospectus
constituting a part of this Registration Statement of our report dated November
5, 1999 relating to the financial statements and schedules of American
Technology Corporation appearing in the Company's Annual Report on Form 10-K for
the year ended September 30, 1999.

We also consent to the reference to us under the caption "Experts" in the
Prospectus.


BDO SEIDMAN, LLP
Denver, Colorado

April 27, 2000


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