NOISE CANCELLATION TECHNOLOGIES INC
S-3/A, 1998-05-08
MISCELLANEOUS ELECTRICAL MACHINERY, EQUIPMENT & SUPPLIES
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   As filed with the Securities and Exchange Commission on May 8,1998
                                                     Registration No. 333-43387
    
- --------------------------------------------------------------------------------
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
       
   
                                 AMENDMENT NO. 1
                                       TO
    
                                    FORM S-3
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933
                 ---------------------------------------------
                      NOISE CANCELLATION TECHNOLOGIES, INC.
             (Exact name of Registrant as specified in its charter)
Delaware                                                             59-2501025
(State or Other Jurisdiction of
(I.R.S. Employer
Incorporation or Organization)
Identification No.)
       1025 West Nursery Road, Linthicum, Maryland 21090 (410) 636-8700
   (Address, Including Zip Code, and Telephone Number, Including Area Code,
                 of Registrant's Principal Executive Offices)
                ---------------------------------------------
                              JOHN B. HORTON, Esq.
             Senior Vice President, General Counsel and Secretary
                      Noise Cancellation Technologies, Inc.
                                 One Dock Street
                           Stamford, Connecticut 06902
                          (203) 961-0500, Extension 388
                (Name, Address, Including Zip Code, and Telephone
         Number,  Including Area Code, of Agent For Service) Copies of all
                          communications and notices to:
                            WILLIAM P. O'NEILL, Esq.
                  CROWELL & MORING 1001 Pennsylvania Avenue, N.W.
                           Washington, D.C. 20004-2595
                                 (202) 624-2500
               ---------------------------------------------
Approximate  date of  commencement  of proposed sale to the public:
From  time to  time  after  the  effective  date  of  this  Registration
Statement.

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 only 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,  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, check
the   following   box.  |_|   __________  
   
                    CALCULATION   OF   REGISTRATION   FEE
- --------------------------------------------------------------------------------
                                  Proposed                                  
                                  Maximum      Proposed         
Title of                          Aggregate    Maximum          Amount of
Shares To be   Amount to be       Price        Aggregate        Registration
Registered     Registered(1)      Per Unit     Offering Price   Fee (1)
- --------------------------------------------------------------------------------
Common Stock   33,273,393 shares  $1.0625 (2)  $35,352,980 (2)  $10,429.13 (2)
- --------------------------------------------------------------------------------
Common Stock      779,250 shares  $0.7815 (3)  $   608,984 (3)  $   179.65 (2) 
- --------------------------------------------------------------------------------

    
   
(1)Pursuant  to Rule 429,  promulgated  under  the  Securities  Act of 1933,  as
   amended, 12,087,864 shares of registrant's Common Stock initially included in
   registrant's registration statements (File Nos. 33-19926, 33-38584, 33-44790,
   33-47611, 33-51468, 33-7442, 33-84694 and 333-10545) that remain unsold as of
   the date hereof are being carried forward in this registration statement. The
   fees  associated  with such shares of Common Stock that were  previously paid
   with such earlier registration statement aggregated $8,293.82.
(2)Estimated solely for the purpose of calculating the registration fee pursuant
   to Rule 457(c)  promulgated  under the Securities  Act of 1933,  based on the
   average  of the high  and low  prices  for the  Common  Stock  on the  NASDAQ
   National  Market  System on December  19,  1997.  $10,429.13  was paid by the
   registrant in connection  with the filing of this  registration  statement on
   December 29, 1997.
(3)Estimated solely for the purpose of calculating the registration fee pursuant
   to Rule 457(c)  promulgated  under the Securities  Act of 1933,  based on the
   average of the high and low prices of the Common Stock on the National Market
   System on May 5, 1998.
    
- --------------------------------------------------------------------------------
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>


INFORMATION   CONTAINED  HEREIN  IS  SUBJECT  TO  COMPLETION  OR  AMENDMENT.   A
REGISTRATION  STATEMENT  RELATING  TO THESE  SECURITIES  HAS BEEN FILED WITH THE
SECURITIES  AND EXCHANGE  COMMISSION.  THESE  SECURITIES MAY NOT BE SOLD NOR MAY
OFFERS TO BUY BE ACCEPTED PRIOR TO THE TIME THE REGISTRATION  STATEMENT  BECOMES
EFFECTIVE.  THIS  PROSPECTUS  SHALL  NOT  CONSTITUTE  AN  OFFER  TO  SELL OR THE
SOLICITATION OF AN OFFER TO BUY NOR SHALL THERE BE ANY SALE OF THESE  SECURITIES
IN ANY STATE IN WHICH SUCH OFFER,  SOLICITATION  OR SALE WOULD BE UNLAWFUL PRIOR
TO REGISTRATION OR QUALIFICATION UNDER THE SECURITIES LAWS OF ANY SUCH STATE.





<PAGE>




   
               SUBJECT TO COMPLETION, DATED MAY 8, 1998
    

                               PROSPECTUS

   
                           46,140,507 SHARES
    

                 NOISE CANCELLATION TECHNOLOGIES, INC.

                              COMMON STOCK
                              ------------
   This  offering   consists  of  378,894   shares  of  Common  Stock  of  Noise
Cancellation  Technologies,  Inc.  (the  "Company")  which are issuable upon the
exercise of outstanding  warrants and options to purchase shares of Common Stock
by persons not deemed "affiliates" of the Company, as that term is defined under
the Securities Act of 1933 (the "Securities Act").

   
   This  offering  also  consists of the resale of  26,000,000  shares of Common
Stock which may be issued upon the conversion of issued and  outstanding  shares
of the Company's  Series C Convertible  Preferred Stock which were issued by the
Company in private  placements exempt from registration under the Securities Act
pursuant to  Regulation D thereunder by persons not deemed  "affiliates"  of the
Company, as that term is defined under the Securities Act.

   In  addition,  this  offering  consists  of the resale of  6,857,1436,872,143
shares of Common  Stock which were  issued by the Company in private  placements
exempt  from  registration   under  the  Securities  Act  and  were  issued  and
outstanding on May 5, 1998, as well as the resale of 4,092,555  shares of Common
Stock which are issuable upon the exercise of  outstanding  warrants and options
to purchase shares of Common Stock to persons who may be deemed  "affiliates" of
the Company and the resale of  8,032,6658,796,915  shares of Common  Stock which
are  issuable  upon the  exercise  of such  warrants  and options to persons not
deemed "affiliates" of the Company, as that term is defined under the Securities
Act.     

   All of the  foregoing  shares of Common  Stock may be offered for sale by the
holders thereof (the "Selling  Stockholders").  The Company will not receive any
of the proceeds  from the sale of such shares  although the Company will receive
the aggregate  proceeds  from the exercise,  from time to time, of the foregoing
warrants and options to purchase shares of Common Stock (see "Use of Proceeds").

   
        SEE "RISK  FACTORS"  ON  PAGES  21  THROUGH  43 FOR  CERTAIN
                   INFORMATION RELATING TO THE COMPANY.
    

THESE  SECURITIES  HAVE NOT BEEN APPROVED OR  DISAPPROVED  BY THE SECURITIES AND
EXCHANGE  COMMISSION OR ANY STATE  SECURITIES  COMMISSION NOR HAS THE SECURITIES
AND  EXCHANGE  COMMISSION  OR ANY STATE  SECURITIES  COMMISSION  PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.

   
   The  Company's  Common Stock is quoted on the NASDAQ  National  Market System
under the symbol  "NCTI".  The last sale price reported for such Common Stock on
May 5, 1998, as quoted by NASDAQ, was 0.781.

                 THE DATE OF THIS PROSPECTUS IS MAY 8, 1998
    


<PAGE>


                           TABLE OF CONTENTS

                                                                  Page
   
Available Information  (Item 2.).................................. 8
Incorporation of Certain Documents by Reference  (Item 12.)....... 9
The Company  (Item 3.)............................................10
Summary Consolidated Financial Data  (Item 3.)....................16
Recent Developments  (Item 11.)...................................19
The Offering  (Item 1.)...........................................20
Risk Factors  (Item 3.)...........................................21
Use of Proceeds  (Item 4.)........................................44
Selling Stockholders  (Item 7.)...................................45
Plan of Distribution  (Item 8.)...................................50
Legal Matters  (Item 10.).........................................51
Experts  (Item 10.)...............................................51
    



<PAGE>


                         AVAILABLE INFORMATION

   The Company is subject to certain of the  informational  requirements  of the
Securities  Exchange  Act of 1934,  as  amended  (the  "Exchange  Act"),  and in
accordance  therewith  files  periodic  reports and other  information  with the
Securities  and  Exchange  Commission  (the  "Commission").  Reports,  proxy and
information  statements  and  other  information  filed  by the  Company  can be
inspected  and  copied at the  public  reference  facilities  maintained  by the
Commission at 450 Fifth Street,  NW,  Washington,  DC 20549 and at the following
regional  offices of the Commission:  Seven World Trade Center,  Suite 1300, New
York, New York 10048 and Suite 1400,  Citicorp Center,  500 West Madison Street,
Chicago,  Illinois 60611.  Copies of such material can also be obtained from the
Public Reference Section of the Commission, 450 Fifth Street, NW, Washington, DC
20549 at prescribed  rates. The Company is an electronic filer on EDGAR pursuant
to Rules 100 and 101 of  Registration  S-T. The Commission  maintains a Web site
that contains  reports,  proxy and information  statements and other information
regarding registrants that file electronically with the Commission.
The address of such site is (http://www.sec.gov).

   The Company has filed with the  Commission  certain  Registration  Statements
under the Securities Act with respect to the  securities  being offered  hereby.
This  Prospectus  does  not  contain  all  the  information  set  forth  in  the
Registration  Statements,  certain parts of which are omitted in accordance with
the rules and regulations of the Commission. For further information,  reference
is hereby made to the Registration Statements.

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


   NO DEALER,  SALESMAN,  OR ANY OTHER  PERSON HAS BEEN  AUTHORIZED  TO GIVE ANY
INFORMATION  OR TO MAKE ANY  REPRESENTATIONS  IN  CONNECTION  WITH THIS OFFERING
OTHER THAN THOSE  CONTAINED  IN THIS  PROSPECTUS,  AND,  IF GIVEN OR MADE,  SUCH
INFORMATION OR REPRESENTATION  MUST NOT BE RELIED UPON AS HAVING BEEN AUTHORIZED
BY THE COMPANY.  THIS  PROSPECTUS  DOES NOT  CONSTITUTE  AN OFFER TO SELL,  OR A
SOLICITATION  OF AN OFFER TO BUY, ANY SECURITIES  OTHER THAN THE COMMON STOCK TO
WHICH IT RELATES OR A SOLICITATION TO ANY PERSON IN ANY JURISDICTION  WHERE SUCH
AN OFFER OR  SOLICITATION  WOULD  BE  UNLAWFUL.  NEITHER  THE  DELIVERY  OF THIS
PROSPECTUS NOR ANY SALE MADE HEREUNDER SHALL, UNDER ANY CIRCUMSTANCE, CREATE ANY
IMPLICATION  THAT THERE HAS BEEN NO CHANGE IN THE AFFAIRS OF THE  COMPANY  SINCE
THE DATE HEREOF.




<PAGE>


            INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

   The following  documents  have been filed by the Company with the  Commission
pursuant to the Exchange Act (File No. 0-18267) and are  incorporated  herein by
reference and made a part hereof:

   
(1)the  Company's  Annual  Report on Form 10-K for the year ended  December  31,
   1997(including Amendment No. 1 thereto filed on April 30, 1998, and Amendment
   No. 2 thereto filed on May 4, 1998); and
    

       
   
(2)the   description  of  capital  stock  found  in  Item  1  of  the  Company's
   Registration  Statement on Form 8-A filed with the  Commission on January 30,
   1990.
    

   All documents  filed by the Company  pursuant to Section 13(a),  13(c), 14 or
15(d) of the Exchange Act  subsequent  to the date of filing of this  Prospectus
and prior to the termination of the offering of the Common Stock covered by this
Prospectus are deemed to be incorporated by reference and shall be a part hereof
from their respective dates of filing.

   Any statement contained in a document  incorporated by reference herein shall
be deemed to be modified or  superseded  for purposes of this  Prospectus to the
extent  that  a  statement   contained  in  this  Prospectus  or  in  any  other
subsequently  filed  document  which also is  incorporated  by reference  herein
modifies  or  supersedes  such  statement.  Any such  statement  so  modified or
superseded  shall  not be  deemed,  except  as so  modified  or  superseded,  to
constitute a part of this Prospectus.

   The Company will provide,  without  charge,  to each person to whom a copy of
this  Prospectus is delivered,  upon written or oral request,  a copy of any and
all of  the  information  that  has  been  incorporated  by  reference  in  this
Prospectus,  but not including exhibits to such information unless such exhibits
are  specifically  incorporated  by  reference  into the  information  that this
Prospectus  incorporates.  Requests  for  copies of such  information  should be
directed  to  Krystyna   Marushak,   Investor   Relations,   Noise  Cancellation
Technologies,  Inc., One Dock Street,  Stamford,  Connecticut  06902,  telephone
number (203) 961-0500, extension 391.



<PAGE>


                              THE COMPANY

   
    
       
   
    
   
   Noise  Cancellation  Technologies,  Inc.  ("NCT" or the  "Company")  designs,
develops,  licenses, produces and distributes electronic systems for Active Wave
Management including systems that electronically reduce noise and vibration. The
Company's  systems are  designed for  integration  into a wide range of products
serving major markets in the transportation, manufacturing, commercial, consumer
products  and  communications  industries.  The  Company  has  begun  commercial
application  of its  technology  through  a number  of  product  lines,  with 70
products currently being sold, including NoiseBuster(R)  communications headsets
and NoiseBuster  Extreme!(TM) consumer headsets,  Gekko(TM) flat speakers,  flat
panel transducers ("FPT(TM)"), ClearSpeech(TM),  microphones, speakers and other
products,   adaptive  speech  filters  ("ASF"),   the   ProActive(TM)   line  of
industrial/commercial  active  noise  reduction  ("ANR")  headsets,  an aviation
headset for  pilots,  an  industrial  muffler or  "silencer"  for use with large
vacuums and blowers,  quieting  headsets  for patient use in magnetic  resonance
imaging ("MRI") machines, and an aircraft cabin quieting system.

   In early 1998,  the Company  introduced  the GekkoTM  flat  speakers  and the
ClearSpeechTM  corporate  intranet  telephone software (the "I-Phone") which the
Company  believes  will have wide  application  in the audio and  communications
industries.  As part of its product line expansion  plans,  the Company plans to
introduce over 25 new products and associated  accessories  during the first six
months of 1998.

   In keeping  with the  direction  established  in late 1994,  during  1997 the
Company continued the practice of marketing its technology  through licensing to
third  parties  for fees and  subsequent  royalties.  During  1997,  the Company
entered into ten new technology license agreements.

   In late 1995, the Company  redefined its corporate  mission to be a worldwide
leader  in the  advancement  and  commercialization  of Active  Wave  Management
technology.   Active  Wave  Management  is  the  electronic   and/or  mechanical
manipulation of sound or signal waves to reduce noise,  improve  signal-to-noise
ratio and/or  enhance  sound  quality.  The Company  also revised its  strategy,
expanding its technology  development  into areas outside of traditional  active
noise  and  vibration  control  in  order  to  address  markets  having  greater
opportunities  such as  communications  and audio.  The  acquisition  of certain
assets  and all of the  intellectual  property  of Active  Noise  and  Vibration
Technologies,  Inc. ("ANVT")  broadened the Company's  portfolio of intellectual
property and removed  restrictions on the Company regarding licensing of certain
jointly held patents (the "Chaplin Patents") to unaffiliated third parties.  The
Company  can now  license the Chaplin  Patents  directly to  unaffiliated  third
parties,  which provides the Company with a greater  ability to earn  technology
licensing  fees and  royalties  from  such  patents.  Thus,  while  the  Company
continues to focus on products  which the Company  believes  will  generate near
term revenue,  it is increasing  its emphasis on technology  licensing  fees and
royalties. Further, the Company is working continuously to lower the cost of its
products and improve their technological performance.

   As  distribution  channels are  established  and as product  sales and market
acceptance  and  awareness  of the  commercial  applications  of  the  Company's
technologies  build,  revenues from  technology  licensing  fees,  royalties and
product  sales are  anticipated  to fund an  increasing  share of the  Company's
requirements.  The revenues  from these  sources,  if realized,  will reduce the
Company's dependence on engineering and development revenues.

   From the Company's inception through December 31, 1997,  approximately 23% of
its  operating  revenues  have  come  from the sale of  products  and 31% of its
operating revenues have come from licensing of the Company's  technology,  while
approximately  46% of its  operating  revenues  have come from  engineering  and
development services.

   Active noise control offers many advantages over traditional  passive methods
of noise control such as  conventional  mufflers,  ear protectors and acoustical
padding.  Active noise control systems: (i) generally reduce only unwanted noise
and permit  desired  sounds such as the human voice,  music or warning  tones to
pass freely,  (ii) are more successful in attenuating low frequency noise, (iii)
contribute  to energy  savings and provide  other  economic  benefits in various
applications, and (iv) generally are smaller and lighter.

   Active Wave Management is the utilization of active noise control  technology
and certain other  technologies  which results in the  electronic and mechanical
manipulation of sound or signal waves to reduce noise,  improve  signal-to-noise
ratio and/or enhance sound quality.

   NCT believes  that it has a  significant  position in Active Wave  Management
technology,  holding 256 patents and an extensive  library of know-how and other
unpatented technology.

   The Company has entered  into a number of strategic  supply,  manufacturing
and marketing  alliances  with leading  global  companies to  commercialize  its
technology.  These strategic  alliances  historically  have funded a substantial
portion of the Company's research and development, and provided the Company with
reliable sources of components, manufacturing expertise and capacity, as well as
extensive   marketing  and   distribution   capabilities.   NCT  has  continuing
relationships  with  Walker  Manufacturing  Company  ("Walker")  (a  division of
Tennessee Gas Pipeline Company, a wholly owned subsidiary of Tenneco,  Inc.), AB
Electrolux ("Electrolux"),  Analog Devices, Inc. ("ADI"), Ultra Electronics Ltd.
("Ultra"),  The  Charles  Stark  Draper  Laboratory,  Inc.  ("Draper"),  Applied
Acoustic Research,  L.L.C.  ("AAR"),  Hoover Universal,  Inc. ("Hoover") and New
Transducers,  Ltd.  ("NXT"),  among others,  in order to penetrate major markets
more  rapidly  and  efficiently,  while  minimizing  the  Company's  own capital
expenditures.

   In March 1995,  the Company and Ultra  amended  their  teaming  agreement and
executed a licensing and royalty agreement for $2.6 million and a future royalty
of 1 1/2% of sales commencing in 1998.

   On November  15,  1995,  the Company and Walker  executed a series of related
agreements (the "Restructuring  Agreements")  regarding the Company's commitment
to help fund $4.0  million of product and  technology  development  work and the
transfer of the Company's 50% interest in Walker Noise Cancellation Technologies
("WNCT") to Walker.  The Restructuring  Agreements  provided for the transfer of
the Company's interest in WNCT (an equally owned partnership  between Walker and
the Company) to Walker,  the  elimination of the Company's  previously  expensed
obligation  to fund  the  remaining  $2.4  million  of  product  and  technology
development  work,  the  transfer to Walker of certain  Company  owned  tangible
assets  related to the  business  of WNCT,  the  expansion  of certain  existing
technology  licenses  and the  Company's  performance  of certain  research  and
development activities for Walker at Walker's expense.

   An important factor for the Company's  continuing  development is its ability
to recruit and retain key personnel.  As of February 28, 1998 the Company had 85
employees,  including 47 engineers and technical  staff.  Among its  engineering
staff and  consultants  are several  scientists  and inventors  that the Company
believes  are  preeminent  in the  active  noise  and  vibration  control  field
worldwide.

   The Company was  incorporated  in Nevada on May 24, 1983. In April 1985,  the
Company  moved its  corporate  domicile to Florida and assumed its present name,
and in January 1987,  following the  assumption of control of the Company by the
present  management,  it changed its state of incorporation  to Delaware.  NCT's
executive offices, research and product development facility are located at 1025
West Nursery Road, Suite 120, Linthicum,  Maryland 21090; telephone number (410)
636-8700. NCT maintains sales and marketing offices at 1 Dock Street, Suite 300,
Stamford,  Connecticut  06902;  telephone  number (203) 961-0500.  The Company's
European  operations are conducted through its product development and marketing
facility in  Cambridge,  England.  NCT also  maintains  a marketing  facility in
Tokyo, Japan.
     




<PAGE>


                  SUMMARY CONSOLIDATED FINANCIAL DATA

   
   The following should be read in conjunction  with the consolidated  financial
statements of the Company and the notes thereto and "Management's Discussion and
Analysis of Financial  Condition  and Results of  Operations",  incorporated  by
reference  into this  Prospectus.  See  "Incorporation  of Certain  Documents by
Reference" Item (1).     


       
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<PAGE>

   
<TABLE>
<CAPTION>
SUMMARY CONSOLIDATED FINANCIAL DATA
                                  (In Thousands of Dollars and Shares)
                                        Years Ended December 31,
    
                            ------------------------------------------------------------
   
                               1993         1994       1995       1996        1997
    
                            ------------------------------------------------------------
   
<S>                         <C>           <C>         <C>      <C>         <C>  
STATEMENTS OF OPERATIONS 
DATA:
REVENUES
Product Sales               $  1,728      $  2,337    $ 1,589   $  1,379    $  1,720
Engineering and    
  development services         3,598         4,335      2,297        547         368
Technology licensing
  fees and other                  60           452      6,580      1,238       3,630
                            ---------     ---------   --------  ---------   ---------
Total revenues              $  5,386      $  7,124    $10,466   $  3,164    $  5,718
                            ---------     ---------   --------  ---------   ---------
COSTS AND EXPENSES:
Cost of sales               $  1,309      $  4,073    $ 1,579   $  1,586    $  2,271
Cost of engineering and 
  development services         2,803         4,193      2,340        250         316
Selling, general and   
  administrative               7,231         9,281      5,416      4,890       5,217
Research and development       7,963         9,522      4,776      6,974       6,235
Interest (income)
  expense, net                  (311)         (580)       (49)        17       1,397 (4)
Equity in net (income) 
  loss of unconsolidated  
  affiliates                   3,582 (1)     1,824        (80)        80           -
Other expense, net                 -           718        552        192         130
                            ---------     --------    --------  ---------   ---------
Total costs and expenses    $ 22,577      $ 29,031    $14,534   $ 13,989    $ 15,566
                            ---------     ---------   --------  ---------   ---------
Net loss                    $(17,191)(1)  $(21,907)   $(4,068)  $(10,825)   $ (9,848)
                            ---------     ---------   --------  ---------   ---------
Less:
Preferred stock  
  dividend requirement             -             -          -          -       1,623
Accretion of difference
  between carrying
  amount and redemption
  amount of redeemable
  preferred stock                  -             -          -          -         285
                            ---------     ---------   --------  ---------   ---------
Net (loss) attributable
  to common stockholders    $(17,191)(1)  $(21,907)   $(4,068)  $(10,825)   $(11,756)
                            ---------     ---------   --------  ---------   ---------
Weighted average number
  of common shares 
  outstanding (2) - basic
  and diluted                 70,416        82,906     87,921    101,191     124,101
                            ---------     ---------   --------  ---------   ---------
Basic and Diluted 
   net loss per share       $  (0.24)(1)  $  (0.26)   $ (0.05)  $  (0.11)   $   (.09)
                            ---------     ---------   --------  ---------   ---------
    
                                              December 31,
                            ---------------------------------------------------------
   
                              1993         1994       1995      1996       1997
    
                            ---------------------------------------------------------
   
BALANCE SHEET DATA:
Total assets               $ 29,541      $ 12,371    $ 9,583   $  5,881    $ 17,361
Total liabilities             6,301         6,903      2,699      3,271       2,984
Long-term debt                    -             -        105          -           -
Accumulated deficit         (46,873)      (68,780)   (72,848)   (83,673)    (93,521)
Stockholders' equity(3)      23,239         5,468      6,884      2,610      14,377
Working capital  
  (deficiency)               19,990           923      1,734     (1,312)     11,696
</TABLE>

(1)In connection with the sale of Common Stock to Tenneco Automotive in December
   1993, the Company  recognized  its share of cumulative  losses not previously
   recorded  with  respect  to  its  joint  venture  with  Walker  amounting  to
   approximately $3.6 million.

(2)Does not include  shares  issuable  upon the  exercise of  outstanding  stock
   options,  warrants and convertible  Preferred Stock, since their effect would
   be antidilutive.

(3)The Company has never declared nor paid cash dividends on its Common Stock.

(4)Includes  interest  expenses of  approximately  $1.4 million  relating to the
   beneficial conversion feature on convertible debt issued in 1997.
    





<PAGE>



       
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<PAGE>


   
    
   
On April 30, 1998, the Company completed the sale of 5.0 million ordinary shares
of Verity acquired upon the Company's exercise on April 7, 1998 of the option it
held to purchase  such shares at a price of 50 pence per share.  This option was
acquired by the Company in connection with the cross license  agreement  entered
into by the  Company,  Verity and NXT.  The Company  realized  $3.2  million net
proceeds  from the  exercise of such option and the sale of the Verity  ordinary
shares received therefrom. 
    



<PAGE>


                              THE OFFERING

   This offering consists of 378,894 shares of Common Stock of the Company which
are issuable upon the exercise of  outstanding  warrants and options to purchase
shares of Common Stock by persons not deemed  "affiliates"  of the  Company,  as
that term is defined under the Securities Act of 1933 the Securities Act.

   
      This offering  also consists of the resale of 26,000,000  shares of Common
Stock which may be issued upon the conversion of issued and  outstanding  shares
of the  Preferred  Stock which were issued by the Company in private  placements
exempt from  registration  under the  Securities  Act  pursuant to  Regulation D
thereunder by persons not deemed  "affiliates"  of the Company,  as that term is
defined under the Securities Act.

      In addition,  this offering  consists of the resale of  6,857,1436,872,143
shares of Common  Stock which were  issued by the Company in private  placements
exempt  from  registration   under  the  Securities  Act  and  were  issued  and
outstanding on May 5, 1998, as well as the resale of 4,092,555  shares of Common
Stock which are issuable upon the exercise of  outstanding  warrants and options
to purchase shares of Common Stock to persons who may be deemed  "affiliates" of
the Company and the resale of  8,032,6658,796,915  shares of Common  Stock which
are  issuable  upon the  exercise  of such  warrants  and options to persons not
deemed "affiliates" of the Company, as that term is defined under the Securities
Act.     

   All of the  foregoing  shares of Common  Stock may be offered for sale by the
holders thereof (see "Selling  Stockholders").  The Company will not receive any
of the proceeds  from the sale of such shares  although the Company will receive
the aggregate  proceeds  from the exercise,  from time to time, of the foregoing
warrants and options to purchase shares of Common Stock (see "Use of Proceeds").


<PAGE>


                               RISK FACTORS

   The shares of Common Stock offered hereby represent a speculative  investment
and entail  elements of risk.  The following  factors,  in addition to the other
information  included or incorporated by reference  herein,  should be carefully
considered  before any  decision is made to purchase any of the shares of Common
Stock offered hereby.

   
   RISKS ASSOCIATED WITH FORWARD-LOOKING STATEMENTS INCLUDED IN THIS PROSPECTUS.
Statements in this Prospectus and the documents incorporated herein by reference
which are not historical facts are  forward-looking  statements under provisions
of the Private  Securities  Litigation  Reform Act of 1995. All  forward-looking
statements  involve  risks and  uncertainties.  The  Company  wishes to  caution
readers that the following  important factors,  among others, in some cases have
affected, and in the future could affect, the Company's actual results and could
cause its actual  results in fiscal  1998 and beyond to differ  materially  from
those expressed in any forward-looking  statements made by, or on behalf of, the
Company.

   Important  factors  that could  cause  actual  results  to differ  materially
include but are not limited to the Company's ability to: achieve  profitability;
achieve a competitive position in design, development, licensing, production and
distribution of electronic  systems for Active Wave  Management;  produce a cost
effective  product  that will gain  acceptance  in relevant  consumer  and other
product  markets;   increase  revenues  from  products;   realize  funding  from
technology  licensing  fees,  royalties,  product  sales,  and  engineering  and
development revenues to sustain the Company's current level of operation; timely
introduce new products;  continue its current level of operations to support the
fees  associated  with the Company's  patent  portfolio;  maintain  satisfactory
relations  with its  five  customers  that  accounted  for 71% of the  Company's
revenues  in 1997;  attract  and retain  key  personnel;  prevent  invalidation,
abandonment or expiration of patents owned or licensed by the Company and expand
its patent  holdings to diminish  reliance on core  patents;  have its  products
utilized beyond noise attenuation and control; maintain and expand its strategic
alliances;  and  protect  Company  know-how,  inventions  and  other  secret  or
unprotected intellectual property.     

   Although  the  Company   believes  that  its   assumptions   underlying   the
forward-looking  statements are reasonable,  any of the assumptions  could prove
inaccurate and,  therefore,  there can be no assurance that the  forward-looking
statements included in this Prospectus and the documents  incorporated herein by
reference will prove to be accurate.  In light of the significant  uncertainties
inherent in the forward-looking  statements included herein and in the documents
incorporated  herein by reference,  the inclusion of such information should not
be regarded  as a  representation  by the  Company or any other  person that the
objectives and plans of the Company will be achieved.

   
   CURRENT FINANCIAL CONDITION; CASH POSITION; CONDITIONAL ADEQUACY OF CURRENTLY
AVAILABLE FUNDS TO SUSTAIN COMPANY; POSSIBLE NEED FOR ADDITIONAL FINANCING. Cash
and cash equivalents amounted to $12.6 million at December 31, 1997.  Management
believes  that  currently  available  funds may not be sufficient to sustain the
Company for the next 12 months.  Such funds  consist of available  cash and cash
from the exercise of warrants and options,  the funding  derived from technology
licensing fees, royalties and product sales and engineering development revenue.
Reducing operating expenses and capital  expenditure alone may not be sufficient
and  continuation  as a going concern is dependent upon the level of realization
of funding from  technology  licensing  fees and royalties and product sales and
engineering and development revenue,  all of which are presently  uncertain.  In
the event that  technology  licensing  fees,  royalties and product  sales,  and
engineering and development revenue are not realized as planned, then management
believes  additional  working  capital  financing must be obtained.  There is no
assurance any such financing is or would become available.

   There can be no assurance that funding will be provided by technology license
fees,  royalties and product sales and engineering and development  revenue.  In
that  event,  the  Company  would  have to  substantially  cut back its level of
operations.  These  reductions  could  have an adverse  effect on the  Company's
relations  with its strategic  partners and customers.  Uncertainty  exists with
respect to the  adequacy of current  funds to support the  Company's  activities
until positive cash flow from  operations  can be achieved,  and with respect to
the availability of financing from other sources to fund any cash deficiencies.
    

       

<PAGE>



       
   NO DIVIDENDS.  The Company has never  declared nor paid  dividends on
its common stock and has no present intention to do so.

   
   GOING CONCERN UNCERTAINTY PARAGRAPH IN OPINIONREPORT OF INDEPENDENT AUDITORS.
The  Company  expects  to  continue  as  a  going  concern,  which  contemplates
continuity of operations,  realization of assets and satisfaction of liabilities
in the  ordinary  course of  business  and its  financial  statements  have been
prepared on that basis.  However,  this going concern  basis is dependent  upon,
among other things,  the  achievement  of future  profitable  operations and the
ability  to  generate  sufficient  cash  from  operations,  public  and  private
financings  and other funding  sources to meet its  obligations  as described in
"Current Financial Condition;  Cash Position;  Conditional Adequacy of Currently
Available  Funds to Sustain  Company;  Possible Need for  Additional  Financing"
above.

   On February 27, 1998, the Company's independent auditors issued its report on
the  Company's  consolidated  financial  statements as of and for the year ended
December  31,  1997.  Their  report  contains  an  explanatory  paragraph  which
emphasizesdiscloses  certain  factors  which  are  described  in  Note  1 to the
financial  statements  covered by the  report.  This  paragraph  notes that such
factors raise  substantial  doubt as to the  Company's  ability to continue as a
going concern.  See "Experts"  below.  pProspective  investors are urged to read
carefully the independent auditors' report as well as the consolidated financial
statements of the Company and the notes thereto,  which are incorporated  herein
by  reference  to the  Company's  Annual  Report on Form 10-K for the year ended
December 31, 1997,  (including  Amendment No. 1 thereto filed on April 30, 1998,
and Amendment No. 2 thereto filed on May 4, 1998).

   HISTORY OF OPERATING LOSSES AND ACCUMULATED  DEFICIT.  The Company incurred a
net loss of $10.8  million for the year ended  December 31, 1996,  and a loss of
$9.8 million for the year ended  December 31, 1997.  The  Company's  accumulated
deficit at December 31, 1997 was $93.5 million, attributable in substantial part
to the costs of developing its proprietary technology. To achieve profitability,
NCT  must,  independently  and  with  strategic  allies,  successfully  develop,
manufacture,  introduce  and market its products in  commercial  quantities  and
receive fees and royalties from licensing its proprietary technology.

   LIMITED  REVENUES.  Although the Company has engaged in marketing  activities
with  regard to the sale or  licensing  of  electronic  systems  for Active Wave
Managementincluding systems that electronically reduce noise and vibration based
upon prototypes of such systems,  its operating revenues from inception in April
1986 through  30December 31, 1997, have been limited,  aggregating $10.8 million
from the sale of such  systems,  $14.6  million from the licensing of technology
relating to such systems and $21.3 million from the  performance  of engineering
and  development  services,   respectively.   Although  the  Company  has  begun
commercial  sales of active noise  attenuation  and other  products in a limited
number of applications, significant further development will be necessary before
many of the  Company's  potential  products  will  achieve  expected  commercial
end-use applications.

   POSSIBLE  FUTURE  DILUTION FROM EXERCISE OF OUTSTANDING  WARRANTS AND OPTIONS
AND  CONVERSION  OF  CONVERTIBLE  SECURITIES.  On October 6, 1992,  the  Company
adopted a stock option plan (the "1992 Plan") covering 6.0 million shares of the
Company's Common Stock and providing for the grant of options to purchase Common
Stock of the  Company  and  awards  of  restricted  common  stock to  employees,
officers  and  directors  of the  Company.  The 1992  Plan was  approved  by the
stockholders at the 1993 Annual Meeting of Stockholders following which said 6.0
million shares were  registered  under the  Securities  Act. An amendment to the
1992 Plan adopted by the Option  Committee on November 8, 1995,  and approved by
the  stockholders at the 1996 Annual Meeting of  Stockholders  (the "1996 Annual
Meeting"),  increased  the number of shares of Common Stock  covered by the 1992
Plan to 10.0  million  shares and added  active  consultants  to the  Company as
persons who are  eligible to  participate  under the 1992 Plan.  The Company has
reserved  10.0 million  shares of Common Stock for issuance upon the exercise of
options  granted  under  the  1992  Plan  and for  issuance  upon  the  grant of
restricted  stock awards under the 1992 Plan.  All of such shares are registered
under the Securities  Act. As of March 31, 1998, the Company has granted options
to purchase  19,835,375  shares of Common Stock of which 6,615,875 are currently
exercisable  and 85,000  shares of  restricted  stock  under the 1992  Plan.  On
January 15,  1998,  the Board of  Directors  further  amended the 1992 Plan (the
"1998  Amendment"),  subject to stockholder  approval,  increasing the number of
shares of Common Stock covered by the 1992 Plan to 30.0 million  shares,  adding
outside  directors  of the  Company's  Board of  Directors  as  persons  who are
eligible to participate under the 1992 Plan,  deleting the formula for grants of
awards of  restricted  Common  Stock and  options to  purchase  Common  Stock to
outside  directors and providing for the  administration of the 1992 Plan by the
Board of  Directors  of the  Company or a  committee  appointed  by the Board of
Directors  consisting  of at least two outside  directors.  The Company plans to
register all of such  additional  20.0 million  shares under the  Securities Act
following stockholder approval of the 1998 Amendment.  As of March 31, 1998, the
Company has granted options to purchase  6,119,000  shares of Common Stock which
will become  exercisable  upon  stockholder  approval of the 1998  Amendment and
options to purchase an  additional  6,511,000  shares of Common Stock which will
become  exercisable  in  increments  on the  later  of the  date of  stockholder
approval of the 1998  Amendment  and other dates  between such date and February
14, 2002, provided the optionee is then employed by or rendering services to the
Company.

   On November 15, 1994, the Company  adopted and on May 8, 1995 and November 8,
1995 amended the Noise Cancellation  Technologies,  Inc. Option Plan for Certain
Directors (the "Directors  Plan"),  pursuant to which options to purchase in the
aggregate  821,000  shares of Common Stock were granted to two  directors of the
Company.  The Directors Plan was approved by the  stockholders  at the Company's
1995 Annual Meeting of  Stockholders  as to options to purchase in the aggregate
725,000  shares of Common Stock.  An amendment to the Directors  Plan adopted by
the Board of Directors on November 8, 1995, and approved by the  stockholders at
the 1996 Annual Meeting,  increased the number of shares of Common Stock covered
by the Plan to 821,000  shares and made certain  minor  changes  concerning  the
Plan's  administration.  The Company has reserved 821,000 shares of Common Stock
for issuance upon the exercise of the options  granted under the Directors  Plan
and has registered such 821,000 shares under the Securities Act. As of March 31,
1998 , the  Company has granted  options to  purchase  746,000  shares of Common
Stock which are currently exercisable under the Directors Plan.

   On April 15, 1997, in connection with a cross license  agreement entered into
by the Company, the Verity Group plc ("Verity") and its wholly owned subsidiary,
New  Transducers  Limited  ("NXT"),  the  Company  granted  Verity  an option to
purchase 3.8 million shares of the Company's Common Stock for a four year period
commencing  on the  first  anniversary  of the  option  agreement  (the  "Verity
Option").  By mutual agreement the Verity Option became exercisable on September
27,  1997.  The Company has  reserved  3.8  million  shares of Common  Stock for
issuance  upon the exercise of the Verity  Option.  The Company also agreed,  if
requested  by  Verity,  to file a  registration  statement  with the  Commission
covering  the shares of Common  Stock  issuable  upon the exercise of the Verity
Option and to use its diligent best efforts to effect the  registration  of such
shares. All of such shares are included in the offering to which this prospectus
relates.

   As of March 31, 1998, the Company has reserved 378,894 shares of Common Stock
for issuance upon the exercise of warrants and options  granted outside the 1992
Plan  and the  Directors  Plan  which  the  Company  has  registered  under  the
Securities Act. The Company has also reserved 1,305,500 shares for issuance upon
the  exercise  of warrants  granted (i) to an investor in an early 1997  private
placement  pursuant to  Regulation  S under the  Securities  Act (the  "Investor
Warrant");  and (ii) in partial  consideration  for  services  rendered by three
placement agents in connection with the 1997 Preferred Stock Private  Placement,
described  below,  by  one  financial  consultant  in  connection  with  another
financing  completed by the Company and by one consultant in connection with the
Company's efforts to complete  development and licensing agreements with a large
European  company,  and 100,000 shares for issuance upon the exercise of options
granted to two non-employee directors of the Company, subject to the approval of
the Company's  stockholders.  All of such shares are included in the offering to
which  this  prospectus  relates  except  the 75,000  shares  issuable  upon the
exercise of the Investor Warrant.

   On May 5,  1998,  the  weighted  average  exercise  price  for all  currently
exercisable and outstanding warrants and options was $0.652.

   Between  October 10, 1997 and December 4, 1997, a subsidiary  of the Company,
NCT Audio, raised $4.0 million of equity capital by means of a private placement
of  2,145  shares  of its  common  stock  pursuant  to  Regulation  D under  the
Securities Act (the "NCT Audio Financing").  Under the terms of the subscription
agreements  for the sale and purchase of NCT Audio common stock  entered into in
connection  with this private  placement,  the  purchasers are granted the right
commencing  90 days after their  purchase of NCT Audio  common stock to exchange
such common stock for the Company's Common Stock at an exchange ratio which will
provide the purchasers a value in the Company's Common Stock equal to the amount
paid  by the  purchasers  for NCT  Audio  common  stock  in  accordance  with an
agreement between such purchasers and the Company.  However,  the purchasers may
not exercise this exchange right if a registration statement of NCT Audio for an
initial  public  offering of NCT Audio common stock is filed with the SEC within
90 days of the delivery of the purchase  price for the NCT Audio common stock by
the purchasers thereof,  but such exchange right is renewed if such registration
statement  does not become  effective  within 180 days after such purchase price
delivery.  Purchasers of $1.7 million in the aggregate of NCT Audio common stock
have agreed to extend such periods from 90 days to 150 days and from 180 days to
240 days,  respectively.  The Company is under no  obligation to register any of
the shares of the Company's  Common Stock which may be issued in connection with
the exercise of the foregoing  exchange  right although such Common Stock of the
Company  may be sold  pursuant to an  applicable  exemption  from  registration.
Because  the  exchange  ratio  will be  determined  by using 80% of the  average
closing bid price of the Company's Common Stock over the five day trading period
immediately  preceding  such date the  exchange  right is  exercised,  it is not
possible to accurately  determine the maximum  number of shares of the Company's
Common Stock that would be issued if all of the  purchasers  of NCT Audio common
stock elected to fully exercise their exchange rights.  If all of the purchasers
of the $4.0  million  in the  aggregate  of NCT  Audio  common  stock  purchased
pursuant to the foregoing private  placements,  become entitled to exercise such
exchange  right and do so at a time when the  average  closing  bid price of the
Company's Common Stock for the five trading days immediately  preceding the date
on which the exchange  right was  exercised  was the same as it was on September
30, 1997  ($0.625 per share) the Company  would be required to issue 8.0 million
shares  of its  Common  Stock.  No  assurance  can be made that the price of the
Company's Common Stock will not be significantly  lower than $0.625 per share in
which event a significant  number of additional  shares of the Company's  Common
Stock would be issued in connection with such exchange.

   Between  November 3, 1997 and December  11, 1997 the Company  issued and sold
13,250  shares of its  Series C  Convertible  Preferred  Stock  (the  "Preferred
Stock") in a private  placement  pursuant to Regulation D of the  Securities Act
(the  "1997  Preferred  Stock  Private  Placement").   The  Preferred  Stock  is
convertible  into shares of the Company's  Common Stock in  accordance  with the
conversion formula (the "Conversion Formula") and other terms and conditions set
forth  in the  subscription  agreements  relating  to the 1997  Preferred  Stock
Private Placement. The conversion terms of the Preferred Stock also provide that
in no event shall the average  closing bid price  referred to in the  Conversion
Formula  be less than  $0.625  per share and in no event  shall the  Company  be
obligated  to issue more than 26.0  million  shares of its  Common  Stock in the
aggregate  in  connection  with  the  conversion  of the  Preferred  Stock.  The
Preferred  Stock is also  redeemable  by the Company in cash or in the Company's
Common Stock in  accordance  with other terms and  conditions  set forth in such
subscription  agreements.  Because the  calculations  required to determine  the
number of shares of the Company's  Common Stock to be issued upon  conversion or
redemption  of the  Preferred  Stock  will be based  upon the length of time the
Preferred  Stock is held as well as the  lesser  of (x) 120% of the five (5) day
average closing bid price of Common Stock  immediately prior to the closing date
of the purchase of the Preferred Stock being converted or (y) 20% below the five
(5) day  average  closing  bid price of Common  Stock  immediately  prior to the
conversion date thereof, it is not possible to accurately  determine the maximum
number of shares of the  Company's  Common  Stock that would be issued  upon any
such  conversion or  redemption.  All 13,250 shares of the Preferred  Stock were
issued when the average closing bid price of the Company's  Common Stock for the
five trading  days  immediately  preceding  issuance was higher than the minimum
conversion price ($0.625).  Therefore under the Conversion Formula if all 13,250
shares of the Preferred  Stock were converted or redeemed one year following the
issuance thereof and the average closing bid price of the Company's Common Stock
for the five trading days  immediately  preceding  the  conversion or redemption
date was equal to or below  $0.625,  the Company would be required to issue 27.6
million  shares of its Common Stock except that under the terms of conversion as
set forth in the subscription  agreements and in the Certificate of Designations
Preferences and Rights of the Preferred Stock  establishing  the Preferred Stock
in accordance with the provisions of the General Corporation Law of the State of
Delaware,  in no event is the Company  obligated to issue more than 26.0 million
shares of its Common Stock in the aggregate in connection with the conversion of
the  Preferred  Stock.  Accordingly,  26.0 million  shares of Common Stock which
could be issuable upon  conversion  of the  Preferred  Stock are included in the
offering to which this prospectus relates.

   The  possibility  of the sale of the shares of Common Stock  described in the
preceding  paragraphs  of this "risk  factor",  all of which  (except the shares
issuable upon the exercise of the Investor  Warrant and the shares  described in
the paragraph relating to the NCT Audio Financing) the Company plans to register
under the  Securities Act to the extent they are not now so registered or exempt
from the  registration  requirements of the Securities Act, may adversely affect
the market price of the Company's Common Stock.

   MATERIAL  DEPENDENCE  UPON CERTAIN  PATENT AND  TRADEMARK  RIGHTS;  UNCERTAIN
PROPRIETARY  PROTECTION.  No assurance can be given as to the range or degree of
protection  any patent or trademark  issued to, or licensed by, the Company will
afford or that such patents, trademarks or licenses will provide protection that
has  commercial  significance  or will provide  competitive  advantages  for the
Company's  products.  No  assurance  can be given  that the  Company's  owned or
licensed patents or trademarks will afford protection  against  competitors with
similar  technology  or  trademarks,  or that  others  will not  obtain  patents
claiming  aspects  similar to those covered by the  Company's  owned or licensed
patents or patent applications.  No assurance exists that the Company's owned or
licensed  patents  or  trademarks  will  not be  challenged  by  third  parties,
invalidated,  rendered unenforceable or designed around. Furthermore,  there can
be  no  assurance  that  any  pending  patent  or  trademark   applications   or
applications  filed in the future  will  result in the  issuance  of a patent or
trademark.  The  invalidation  or expiration  of patents or trademarks  owned or
licensed  by  the  Company  and  believed  by  the  Company  to be  commercially
significant could permit increased  competition,  with potential adverse effects
on the Company and its business prospects.  Although the Company intends to file
for extensions to certain  patents,  the Company can make no assurances that the
U.S. or foreign government patent authorities will grant such extensions.

   The Company has conducted only limited  patent and trademark  searches and no
assurances  can be given that patents or  trademarks do not exist or will not be
issued in the future that would have an adverse effect on the Company's  ability
to market its products or maintain its competitive  position with respect to its
products.  Substantial resources may be required to obtain and defend patent and
trademark rights to protect present and future  technology and trademarks of the
Company.     

   An  interference  proceeding  has been  initiated  with respect to one of the
Company's  patent  applications.  There has also been an inquiry  regarding  the
product design configuration of one of the Company's products as it relates to a
patent held by another company.  Another  competitor has implied that a possible
conflict  exists between the Company's  application of certain of its technology
and a patent  recently  allowed to the  competitor and that the Company's use of
what the Company  believes is a generic phrase  conflicts with a trademark which
the  competitor  has  applied  for.  The Company  believes  that such claims and
inquiry are without merit and intends to oppose them  vigorously.  Moreover,  if
such inquiry proves to have any merit,  the Company  believes it could,  without
significant  cost,  modify  its  product  design  configuration  so as to  avoid
infringement.  The  Company  does not  believe  that any damages or costs it may
incur as a result of such claims or inquiry would have a material adverse effect
on the financial condition of the Company.

   The Company's policy is to enter into confidentiality  agreements with all of
its executive officers,  key technical personnel and advisors, but no assurances
can be made that Company  know-how,  inventions  and other secret or unprotected
intellectual property will not be disclosed to third parties by such persons.

   
   RAPID TECHNOLOGICAL  CHANGE.  Active Wave Management is an evolving industry,
characterized  by rapid  technological  change.  The  Company  intends to engage
continually in research and development activities, including the improvement of
current  products and  development  of new products.  There can be no assurance,
however,  that active noise and vibration  attenuation or other  applications of
Active Wave Management will be accepted by the commercial marketplace,  that the
introduction  of new products or the  development of new  technologies by others
will not render the Company's  products  obsolete or  unmarketable,  or that the
Company will be able to hire and retain adequate  research  personnel or be able
to finance research activities in this regard.

   RELIANCE UPON STRATEGIC ALLIANCES; COMMERCIAL ACCEPTANCE OF END-PRODUCTS. The
Company  and  certain  of  its  wholly  owned  subsidiaries  have  entered  into
agreements to establish strategic alliances related to the design,  development,
manufacture,  marketing and distribution of its electronic  systems and products
containing such systems.  These  agreements  generally  provide that the Company
license its technology  and  contribute a nominal amount of initial  capital and
that the other  party  provide  substantially  all of the funding to support the
alliance.  In exchange for this funding,  the other party  generally  receives a
preference in the  distribution  of cash and/or  profits or royalties from these
alliances until such time as the support funding,  plus an "interest"  factor in
some  instances,  is  recovered.  At December 31, 1997,  there were no preferred
distributions  due to joint venture  partners  from future  profits of the joint
ventures.

   The Company conducts its marketing efforts primarily by identifying  specific
market segments for active noise and vibration attenuation and other Active Wave
Management  products and,  thereafter,  seeking to establish strategic alliances
with major  domestic  and  international  business  concerns to support  product
development,  and  to  manufacture  and  distribute  products  for  such  market
segments.  The  Company's  ability  to enter  into  new  markets  is  materially
dependent upon  determinations by such concerns that the Company's  products are
suitable  for use in  their  respective  end-products,  and on the  ability  and
willingness of those concerns to market such products successfully. During 1995,
1996  and  1997  active  headset  product  sales  did not  increase  at the rate
previously anticipated and orders for active vehicular mufflers, kitchen exhaust
and HVAC fan  quieting  systems and  industrial  headsets  were not  received at
volumes or within time frames that had been anticipated by the Company.
    

   The Company  arranges for the supply of  actuators,  integrated  circuits and
other  electronic  components for its active control systems  through  alliances
with  manufacturers  the Company  believes will serve as  dependable  sources of
supply.  The  Company  makes no  assurances  that these  concerns  will meet the
Company's  and  its  customers'  needs  for  quality  components  in  sufficient
quantities at commercially reasonable prices.

   
   CUMULATIVE  LOSSES IN JOINT VENTURES.  When the Company's share of cumulative
losses in a strategic  alliance  exceeds its  investment  and the Company has no
obligation to fund such additional  losses,  the Company  suspends  applying the
equity method of accounting for its  investment in such alliance.  The estimated
aggregate amount of losses in the Company's strategic alliances in excess of the
Company's investments which has not been recorded was not considered material at
December 31,  1997.  The Company will not be able to record any equity in income
with respect to an entity  until its share of future  profits is  sufficient  to
recover any cumulative losses that have not previously been recorded.
    

   DEPENDENCE  UPON EXECUTIVE  OFFICERS AND OTHER KEY  PERSONNEL.  The Company's
operations are, and for the proximate future will be, materially  dependent upon
the efforts of its executive officers and key technical  employees,  all of whom
serve  the  Company  on a  full-time  basis  but none of whom are  contractually
obligated to remain in the Company's employ for any material term. Moreover, the
Company's  growth and  expansion  into new product  applications  could  require
additional expertise in areas such as manufacturing, marketing and distribution,
which would place increased demands on the Company's resources and would require
the addition of new personnel  and the  development  of additional  expertise by
existing  personnel.  Certain  academic  consultants  serve  the  Company  on  a
part-time basis, and could terminate their  relationship with the Company at any
time.

   Certain  employees and consultants of the Company have been approached by the
Company's competitors,  and no assurances can be given that the competition will
not  successfully  recruit  such  personnel.  The loss of key  personnel  or the
failure to recruit necessary  additional  personnel could impede the achievement
of the Company's development, commercialization and marketing objectives.

   POSSIBLE RISKS ASSOCIATED WITH AGREEMENTS WITH RELATED  PARTIES;  COMMISSIONS
AND EXCLUSIVE DISTRIBUTORSHIPS. In 1993 the Company entered into four agreements
with QuietPower  Systems,  Inc. ("QSI") (formerly Active  Acoustical  Solutions,
Inc.) and in 1994 entered into a fifth  agreement  with QSI. QSI is 33% owned by
Environmental  Research  Information,  Inc. ("ERI") and 2% owned by Jay M. Haft,
Chairman  of the  Board  of  Directors  of the  Company.  Michael  J.  Parrella,
President of the Company owns  approximately  12% of the outstanding  capital of
ERI and Mr.  Haft  shares  investment  control  over  an  additional  24% of the
outstanding  capital of ERI.  Under  these  agreements,  QSI is given  rights to
market certain of the Company's  products and  technologies  to electric  and/or
natural  gas  utilities  and for use in or with  feeder  bowls.  In one of these
agreements,  QSI's rights are on an exclusive basis so long as QSI meets certain
performance criteria relating to marketing efforts and sales performance.  Under
one of these agreements,  QSI is entitled to receive a sales commission equal to
129% of QSI's marketing  expenses  attributable to the marketing of the products
in  question,  which  expenses are to be deemed to be the lesser of QSI's actual
expenses or 35% of the  revenues  received by the Company  from the sale of such
products.  Commissions and fees payable under all of the other agreements are in
accordance  with the Company's  standard  terms and conditions and do not exceed
6%. As of the date of this Prospectus,  the Company has not been required to pay
any commissions to QSI under these agreements.

   In March 1995,  the Company  entered into a Master  Agreement  with QSI under
which QSI was granted an exclusive  worldwide  license under certain NCT patents
and technical  information to market, sell and distribute  transformer  quieting
products,  turbine  quieting  products and certain other products in the utility
industry. Under the Master Agreement, QSI is to fund development of the products
by the Company and the Company is to manufacture the products.  However, QSI may
obtain  the  right to  manufacture  the  products  under  certain  circumstances
including NCT's failure to develop the products or the failure of the parties to
agree on certain  development  matters.  In  consideration of the rights granted
under the  Master  Agreement,  QSI is to pay the  Company a royalty of 6% of the
gross  revenues  received  from the sale of the  products  and 50% of the  gross
revenues  received from  sublicensing the rights granted to QSI under the Master
Agreement  after  QSI has  recouped  150% of the  costs  incurred  by QSI in the
development of the products in question. The Company is obligated to pay similar
royalties to QSI on its sale of the products and the licensing of rights covered
under the Master  Agreement  outside  the  utility  industry  and from sales and
licensing  within the  utility  industry  in the Far East.  In  addition  to the
foregoing  royalties,  QSI is to  pay an  exclusivity  fee  to  the  Company  of
$750,000; $250,000 of which QSI paid to the Company in June 1994. The balance is
payable in equal monthly  installments of $16,667 beginning in April 1995. QSI's
exclusive rights become  non-exclusive  with respect to all products if it fails
to pay any installment of the exclusivity fee when due and QSI loses such rights
with respect to any given product in the event it fails to make any  development
funding payment applicable to that product.  The Master Agreement supersedes all
other agreements  relating to the products  covered under the Master  Agreement,
including those agreements between the Company and QSI described above.

   Immediately following the execution to the Master Agreement,  the Company and
QSI entered into a letter agreement  providing for the termination of the Master
Agreement at the Company's election if QSI did not pay approximately $500,000 in
payables then owed to the Company by May 15, 1995.

   In April 1995,  the Company and QSI entered  into  another  letter  agreement
under  which QSI  agreed to  forfeit  and  surrender  the five year  warrant  to
purchase  750,000  shares of the Company's  Common Stock issued to QSI under the
first Marketing Agreement described above. In addition,  the $500,000 balance of
the  exclusivity  fee  provided  for under the Master  Agreement  was reduced to
$250,000 to be paid in 30 monthly installments of $8,333 each and the payment of
the  indebtedness  to be  paid  under  the  letter  agreement  described  in the
proceeding  paragraph was revised to be the earlier of May 15, 1996, or the date
of closing of a financing of QSI in an amount exceeding $1.5 million,  whichever
first  occurs.  Such  indebtedness  was to be evidenced  by a  promissory  note,
non-payment of which would  constitute an event of termination  under the Master
Agreement.

   In May,  1996,  the Company and QSI entered  into  another  letter  agreement
extending the time by which the payments from QSI to the Company under the April
1995  letter  agreement  described  above were to be made.  Under the letter the
payment of certain  arrearages in the payment of the  exclusivity  fee was to be
made not later than June 15, 1996, with the balance  continuing to be payable by
monthly payments of $8,333 and as provided in the May 1995 letter agreement.  In
addition the payment of the other indebtedness owed by QSI to the Company was to
be paid by a payment  of $25,000 at the time QSI  obtained  certain  anticipated
financing with the balance paid by monthly payments of $15,000 each.  Default in
QSI's timely payment of any of the amounts  specified in the May 21, 1996 letter
agreement was to cause the immediate termination of the Master Agreement and all
rights granted to QSI thereunder.

   On April 9, 1997, the Company and QSI entered into another  letter  agreement
revising  the payment  schedule  set forth in the May 21, 1996 letter  agreement
applicable to the payment of the  indebtedness  owed to the Company by QSI other
than the unpaid portion of the exclusivity fee. Under the revised schedule,  the
full amount of such indebtedness is to be paid by an initial payment of $125,000
on or before April 21, 1997,  and a second  payment of $200,000 upon the closing
of a proposed  financing  in June 1997 or on January  1, 1998,  whichever  first
occurs.  The  Company is also  entitled  to receive  15% of any other  financing
obtained  by QSI in the interim as well as interest at the rate of 10% per annum
on the  unpaid  amount  of such  indebtedness  from  July 1,  1997.  The  letter
agreement  also  provides for the  continuation  of QSI's  payment of $11,108 by
April 21, 1997, for headset  products sold by the Company to QSI in 1996. In the
event of a default in QSI's  timely  payment of any of the amounts  specified in
the April 9,  1997  letter  agreement,  the  Company  has the right to cause the
termination  of the Master  Agreement and all rights  granted by QSI  thereunder
upon 10 days notice of termination to QSI.

   
   As of March 31, 1998, QSI has paid all  installments  due and payable for the
exclusivity fee, and still owes the Company $150,000 which was due on January 1,
1998, and is fully reserved by the Company,  and, other than as described above,
as of the date of this Prospectus, owes no other amounts to the Company.
    

   The Company believes that the terms of its agreements with QSI are comparable
to those that it could have negotiated with other persons or entities.

   
   COMPETITION.  The Company is aware of a number of direct  competitors  in the
field of Active Wave Management.  Indirect  competition also exists in the field
of passive sound and vibration attenuation.  The Company's principal competitors
in  active  control  systems  include  Andrea  Electronics   Corporation,   Bose
Corporation,  Digisonix (a division of Nelson Industries, Inc.), Group Lotus PLC
and Lotus Cars Limited,  Lord Corporation,  Matsushita  Electric Industrial Co.,
Ltd.,  Sennheiser  Electronic  Corp.  and Sony  Corporation,  among others.  The
Company's  principal  competitors  in other  fields  of Active  Wave  Management
include  IBM  Corporation,  Lucent  Technologies,  Inc.  and Texas  Instruments,
Incorporated.  To the Company's knowledge, each of such entities is pursuing its
own technology in active control systems,  either on its own or in collaboration
with others, and has recently  commenced  attempts to commercially  exploit such
technology.  NCT also believes that a number of other large  companies,  such as
the  major  domestic  and  foreign  communications,   computer,  automobile  and
appliance  manufacturers,  and aircraft parts suppliers and manufacturers,  have
research and development  efforts  underway in Active Wave Management and active
noise and vibration control.  Many of these companies,  as well as the Company's
potential  competitors in the passive sound and vibration  attenuation field and
other  entities  which could enter the active  noise and  vibration  attenuation
field and other fields of Active Wave Management as the industry  develops,  are
well  established  and  have  substantially   greater   management,   technical,
financial, marketing and product development resources than the Company.
    
       
   
   NASDAQ/NMS LISTING  REQUIREMENTS;  DISCLOSURE  RELATING TO LOW-PRICED STOCKS.
The Company's  Common Stock  currently is quoted on the National  Association of
Securities   Dealers,   Inc.   Automated   Quotation   National   Market  System
("NASDAQ/NMS"). The NASDAQ/NMS has adopted quantitative maintenance criteria for
continued  listing by the NASDAQ/NMS under which the Company is required,  among
other things, to maintain:  (i) net tangible assets of $4.0 million;  and (ii) a
market value of publicly held shares of $5.0 million. In addition, for continued
listing the  Company's  Common  Stock must have a minimum bid price of $1.00.  A
failure to meet the continued  inclusion  requirements  for minimum bid price is
determined  to  exist  only  if the  deficiency  continues  for a  period  of 30
consecutive  business days. Upon such failure,  the Company will be notified and
will  have a period  of 90  calendar  days from  such  notification  to  achieve
compliance with the continued inclusion standard.  Compliance can be achieved by
meeting the standard for a minimum of 10 consecutive business days during the 90
day  compliance  period.  On March 31,  1998,  the amount of the  Company's  net
tangible  assets was  approximately  $13.2  million and the market  value of its
publicly held shares was $101.1 million.  From March 19, 1998, through April 28,
1998,  the minimum  bid price for the  Company's  Common  Stock as quoted on the
NASDAQ/NMS was below $1.00.  On April 29, 1998, such minimum bid price was $1.00
and from April 30,  1998  through  May 5, 1998 such  minimum  bid price has been
below  $1.00.  Management  believes  the Company  will be able to  maintain  net
tangible assets of at least $4.0 million at least through the year 1998 although
no assurance can be given that circumstances will not occur which will cause the
Company's net tangible  assets to fall below $4.0 million  before that time. See
"Current Financial Condition;  Cash Position;  Conditional Adequacy of Currently
Available  Funds to Sustain  Company;  Possible Need for Additional  Financing",
"Going  Concern  Emphasis  Paragraph  in  Accountants'  Opinion",  and  "Limited
Revenues" above.  Because the minimum bid price of the Company's Common Stock is
dependent  on  numerous  market  factors  not  within  the  Company's   control,
management  is unable to express an opinion of the  likelihood  that the minimum
bid price of the  Company's  Common Stock will  continue to meet the  NASDAQ/NMS
requirements  or,  in the  event of a  failure  to do so,  the  likelihood  that
compliance  could be achieved  within the requisite 90 day period.  For the same
reasons  management is unable to express an opinion of the  likelihood  that the
market  value of publicly  held shares of the  Company's  Common Stock will fall
below $5.0  million  which would occur if the number of publicly  held shares of
the  Company's  Common  Stock  was the same  number  as  existed  on May 5, 1998
(111,542,584 shares) and the price per share fell below $0.0448. On May 5, 1998,
the price per share of the  Company's  Common  Stock was $0.781.  Failure of the
Company to continue to meet the  maintenance  requirements  could  result in the
Common Stock losing its NASDAQ/NMS designation.  The NASDAQ/NMS provides brokers
and  others  with  immediate  access to the best bid and asked  prices and other
information  about the Common Stock during each trading day. If the Company were
to lose its NASDAQ/NMS  designation,  real-time price information for the Common
Stock might cease to be available. As a result, a stockholder might find it more
difficult to dispose of, or to obtain  accurate  quotations  as to the price of,
the Common  Stock.  In  addition,  if the  Company  were to lose the  NASDAQ/NMS
designation,  the Common Stock might no longer qualify as a "margin security" as
defined by the Federal Reserve Board.     

   If the  Company  were to lose its  NASDAQ/NMS  designation  and,  at any time
following  the loss of such  designation,  did not have either (i) net  tangible
assets  in excess of $2.0  million  or (ii)  average  revenue  of at least  $6.0
million for the last three years,  the Common Stock could become  subject to the
Commission's  "penny stock" rules. The penny stock rules impose additional sales
practice  requirements on broker-dealers who sell securities designated as penny
stocks  to  persons  other  than  established  customers  and  certain  types of
accredited  investors.  For  transactions  covered by the penny stock rules, the
broker-dealer  must make a special  suitability  determination for the purchaser
and must have received the purchaser's  written consent to the transaction prior
to the sale.  The rules require the  delivery,  prior to the  transaction,  of a
disclosure  schedule  prepared  by the  Commission  relating  to the penny stock
market.  The rules also require  disclosure by the  broker-dealer of commissions
payable to both the broker-dealer and the registered  representative and current
quotations for the securities. If the broker-dealer is the sole market-maker for
the  penny  stock,   the   broker-dealer   must   disclose  this  fact  and  the
broker-dealer's  presumed control over the market.  Finally,  monthly statements
must be sent disclosing recent price information for the penny stock held in the
customer's  account and  information on the limited market in penny stocks.  The
additional  burdens  imposed  upon  broker-dealers  by the penny stock rules may
discourage  broker-dealers from effecting transactions in penny stocks. Thus, if
the  Common  Stock were to fall  within the  definition  of a penny  stock,  the
liquidity  of the Common  Stock  could be reduced  and there could be a material
effect on the trading market for the Common Stock.

   POSSIBLE  VOLATILITY  OF COMMON STOCK.  The market  prices for  securities of
emerging and  high-technology  companies have historically been highly volatile.
Future  announcements  concerning  the Company or its  competitors  could have a
significant impact on the market price of the Common Stock.

   
   BLANK CHECK PREFERRED  STOCK.  The Board of Directors has total discretion in
the issuance and the determination of the rights and privileges of any shares of
Preferred Stock which might be issued in the future, which rights and privileges
may be detrimental to the holders of the Common Stock. The Company is authorized
to issue 10.0 million shares of Preferred Stock 13,250 shares of which have been
designated  to  date.  The  issuance  of  Preferred  Stock in the  future  could
discourage or impede a tender offer, proxy contest or other similar  transaction
involving a potential change in control of the Company,  which transaction might
be  viewed  favorably  by other  shareholders.  Management  is not  aware of any
efforts to acquire control of or take over the Company.

  RISKS   ASSOCIATED   WITH  YEAR  2000.  The  Company   believes  the  cost  of
administrating its Year 2000 Compliance program will not have a material adverse
impact  on future  earnings.  However,  the  potential  costs and  uncertainties
associated  with any Year 2000  Compliance  program  will  depend on a number of
factors,  including  software,  hardware and the nature of the industry in which
the Company,  its subsidiaries,  suppliers and customers  operate.  In addition,
companies must  coordinate  with other  entities with which they  electronically
interact, such as customers, suppliers, financial institutions, etc.

  Although the Company's  evaluation  of its systems is still in process,  there
has been no indication  that the Year 2000  Compliance  issue,  as it relates to
internal  systems,  will have a material  impact on future  earnings.  While the
Company  is not  aware  of any  material  Year  2000  Compliance  issues  at its
customers and suppliers,  such potential problems remain a possibility and could
have a material adverse impact on the Company's future results.


  RECENTLY ISSUED ACCOUNTING PRONOUNCEMENTS.
    

  The Financial  Accounting  Standards Board has recently  issued  Statements of
Financial Accounting Standards No. 129, "Disclosure of Information about Capital
Structure", No. 130, "Reporting Comprehensive Income", and No. 131, "Disclosures
about  Segments of an Enterprise and Related  Information".  The Company has not
determined  whether the above  pronouncements  will have a significant effect on
the information presented in its financial statements.

   LITIGATION.  On or about June 15, 1995,  Guido Valerio filed suit against the
Company in the Tribunal of Milan,  Milan,  Italy. The suit requests the Court to
award  judgment in favor of Mr.  Valerio as follows:  (i)  establish and declare
that a proposed  independent  sales  representation  agreement  submitted to Mr.
Valerio by the Company and signed by Mr. Valerio but not executed by the Company
was made and entered into between Mr.  Valerio and the Company on June 30, 1992;
(ii)  declare  that the  Company  is guilty of breach of  contract  and that the
purported agreement was terminated by unilateral and illegitimate  withdrawal by
the  company;  (iii)  order the Company to pay Mr.  Valerio  $30,000 for certain
amounts  alleged  to be owing to Mr.  Valerio  by the  Company;  (iv)  order the
Company to pay  commissions to which Mr. Valerio would have been entitled if the
Company had followed up on certain  alleged  contacts made by Mr. Valerio for an
amount to be assessed by  technicians  and  accountants  from the Court Advisory
Service;  (v) order the Company to pay damages for the harm and losses sustained
by Mr.  Valerio in terms of loss of earnings  and failure to receive due payment
in an amount such as shall be determined  following  preliminary  investigations
and the assessment to be made by experts and accountants from the Court Advisory
Service and in any event no less than 3 billion Lira ($18.9  million);  and (vi)
order the Company to pay damages for the harm done to Mr. Valerio's image for an
amount such as the judge shall deem  equitable  and in case for no less than 500
million Lira ($3.1 million). The Company retained an Italian law firm as special
litigation counsel to the Company in its defense of this suit. On March 6, 1996,
the  Company,  through  its  Italian  counsel,  filed a brief of reply  with the
Tribunal of Milan  setting  forth the  Company's  position  that:  (i) the Civil
Tribunal of Milan is not the proper venue for the suit, (ii) Mr. Valerio's claim
is  groundless  since the parties  never  entered into an  agreement,  and (iii)
because Mr.  Valerio is not enrolled in the official  Register of Agents,  under
applicable  Italian law Mr. Valerio is not entitled to any  compensation for his
alleged  activities.  A preliminary  hearing before the Tribunal was held on May
30, 1996,  certain pretrial  discovery has been completed and a hearing before a
Discovery  Judge was held on October 17, 1996.  Submissions of the parties final
pleadings  were to be  made in  connection  with  the  next  hearing  which  was
scheduled for April 3, 1997. On April 3, 1997,  the  Discovery  Judge  postponed
this hearing to May 19, 1998, due to a reorganization of all proceedings  before
the Tribunal of Milan.  Management is of the opinion that the lawsuit is without
merit and will  contest  it  vigorously.  In the  opinion of  management,  after
consultation  with outside  counsel,  resolution  of this suit should not have a
material  adverse  effect on the  Company's  financial  position or  operations.
However,  in the event  that the  lawsuit  does  result in a  substantial  final
judgment against the Company,  said judgment could have a severe material effect
on quarterly or annual operating results.

   
   On September 16, 1997, Ally Capital  Corporation  ("Ally") filed suit against
the Company, John J. McCloy II, Michael J. Parrella, Jay M. Haft and Alistair J.
Keith in the United States  District Court for the District of Connecticut  (the
"District Court"). The complaint was not served on the Company until January 15,
1998,  and has yet to be served on the  individual  defendants.  The  individual
defendants  are current and former  officers and  directors of the Company.  The
complaint  alleges three (3) causes of action  arising out of an agreement  (the
"Asset Purchase  Agreement")  which the Company entered into with another entity
known as Active Noise and  Vibration  Technologies,  Inc.  ("ANVT")  whereby the
Company agreed to acquire ANVT's patented and unpatented  intellectual property,
the rights and obligations  under a defined list of agreements  between ANVT and
twenty-one  (21) other  parties (the "Listed  Parties")  relating to existing or
potential  joint  ventures,  licensing  and other  business  relationships,  and
certain items of office and laboratory equipment.  For these assets, the Company
paid ANVT two hundred thousand ($200,000.00) dollars and issued ANVT two million
(2,000,000)  shares of the Company's common stock. The Asset Purchase  Agreement
also provided ANVT with the right to certain contingent payments,  to the extent
the Company generated certain levels of revenue from joint venture, licensing or
other contractual  relationships with any of the Listed Parties.  Plaintiff Ally
is an  unsecured  creditor  of ANVT  and is not a party  to the  Asset  Purchase
Agreement;  however,  Ally asserts an interest to part of the consideration paid
ANVT by virtue of an escrow agreement  between ANVT and the escrow agent for the
benefit of ANVT's  secured  and  unsecured  creditors.  Ally  purports to allege
claims of fraud,  negligent  misrepresentation and a claim under the Connecticut
Unfair Trade Practice Act based upon purported representations made to ANVT, not
Ally. Thus, it is alleged that the Company  misrepresented to ANVT the Company's
financial  condition,  the number of shares it could  issue and the value of the
contingent payment rights under the Asset Purchase Agreement. In connection with
the claims, Ally seeks compensatory damages in excess of one million two hundred
thousand ($1,200,000.00)  dollars,  punitive damages and attorney fees. On March
4, 1998,  the  Company  served its motion to dismiss the  complaint  pursuant to
Federal Rule of Civil Procedure 12. The basis for the motion  include:  that the
summons and  complaint  were not served for more than one hundred  twenty  (120)
days  after the  complaint  was filed,  in  violation  of Federal  Rule of Civil
Procedure  4; that Ally lacks  standing to bring its claims as they are based on
purported representations made by the Company to ANVT, not Ally; that the claims
are legally insufficient under Connecticut law; and that plaintiff has failed to
join necessary parties, ANVT and the escrow agent. On March 16, 1998, Ally filed
a notice of voluntary dismissal as to the individual defendants, Messrs. McCloy,
Parrella, Haft and Keith. As no discovery has taken place, the Company is unable
to assess the likelihood of an adverse result. Management,  however, believes it
has  meritorious  defenses  and  intends a  vigorous  defense  of this  lawsuit.
However,  in the event this lawsuit does result in a substantial  final judgment
against  the  Company,  said  judgment  could have a severe  material  effect on
quarterly or annual operating results.     



<PAGE>


                             USE OF PROCEEDS

   
   All of the shares of Common  Stock  offered  hereby are being  offered by the
Selling  Stockholders  and the Company will not receive any of the proceeds from
their sale.  However,  the Company will receive the aggregate  proceeds from the
exercise,  from time to time,  of the  warrants  and options to purchase  Common
Stock described on the cover of this  prospectus and under "The  Offering".  The
exercise  price for such  options  and  warrants  ranges from $0.50 to $5.36 per
share. The aggregate proceeds, from the exercise of all such warrants or options
would be $5,663,873 and, to the extent realized,  will be added to the Company's
working  capital.  The expenses  payable by the Company in connection  with this
registration  statement are estimated to be $49,109. There are no other material
incremental expenses attributable solely to the issuance and distribution of the
above described shares.     



<PAGE>


                          SELLING STOCKHOLDERS

   The  following  table  sets forth  certain  information  with  respect to the
Selling  Stockholders.  The shares set forth  therein have been  included in the
Registration  Statements  of which  this  Prospectus  forms a part  pursuant  to
registration  commitments  afforded to the Selling  Stockholders  by contractual
obligations.  The Company  will not receive  any  proceeds  from the sale of the
shares by the Selling Stockholders.


   
<TABLE>
<CAPTION>
SELLING STOCKHOLDERS                                                                           Beneficial
                                                        Beneficial           Number of         Ownership
                                                        Ownership            Shares of         of Shares of
                                                        of Shares            Common            Common Stock
                                                        of Common            Stock             After Giving
                                  Relationship          Stock                Offered           Effect to
                                  With                  at May 5,            For               Proposed
Name of Selling Stockholder       The Company           1998 (1)             Sale (1)          Sale (1)
- ---------------------------       ------------          ----------           ----------        ------------
<S>                               <C>                   <C>                  <C>               <C>    
                                           
    
       
- ----------------------  ------------  --------       -------       -------


   
1176697 Ontario Limited                                    392,453 (20)         392,453 (20)              -

Alliance Advisory Partners, LLC                            300,000              300,000                   -
    

Alexander Wescott & Co., Inc.                               78,750               78,750                   -
Co., Inc.

   
Arab Commerce Bank Ltd.                                    245,283 (20)         245,283 (20)              -

Atlantis Capital Fund, Ltd.                              1,412,830 (20)       1,412,830 (20)              -

BarAub Corp.                                                49,057 (20)          49,057 (20)              -

Black Sea Investments, Ltd.                                588,679 (20)         588,679 (20)              -

Canadian Advantage Limited Partnership                   1,187,170 (20)       1,187,170 (20)              -

J.P. Carey, Inc.                                           418,125              418,125                   -
    

Michael Dickerson                                        2,067,698              600,000           1,467,698

   
Dominion Capital Fund, Ltd.                              4,993,962 (20)       4,993,962 (13)(20)          -
    
       
   
Excalibur Limited Partnership                              981,132 (20)         981,132 (20)              -

Faisal Finance (Switzerland) SA                            784,906 (20)         784,906 (20)              -

Fernhill Holding Ltd.                                      392,453 (20)         392,453 (20)              -

First Atlanta Securities, LLC                               83,625               83,625                   -                       

First Empire Corporation                                   392,453 (20)         392,453 (20)              -

Ronald Frisch                                              215,849 (20)         215,849 (20)              -
    

Graham Eatwell                      (2)                    131,475               75,000              56,475

William W. Gerecke                                          47,150               35,000              12,150

   
Tiebing Guan                                               196,226 (20)         196,226 (20)              -

Jay M. Haft                         Chairman Of The      1,982,000 (5)          468,500           1,513,500 (5)
                                    Board and Director
    

   
Cy E. Hammond                       Senior Vice            644,718 (6)           25,000             619,718 (6)
                                    President, Chief       
                                    Financial Officer
    
                        
   
John B. Horton                      Senior Vice            734,417 (7)           20,000             714,417 (7)
                                    President, General
                                    Counsel and 
                                    Secretary
    
 
   
The Isosceles Fund Limited                               2,060,377 (20)       2,060,377 (12)(20)          -

JeFrob Glorich Ltd.                                        215,849 (20)         215,849 (20)              -

Irene Lebovics                     Senior Vice           2,388,067 (11)         996,767           1,391,300
                                   President
    

   
Lenco Consulting Corporation                                15,000               15,000                   -

    

John L. Lesher                                             105,000               20,000              85,000

William A. Marquard                                         50,000               50,000                   -

   
John J. McCloy                      Director             3,811,591 (8)        3,661,591 (14)        150,000

National Utility Services                                  215,849 (20)         215,849 (20)              -
(Canada) Ltd.
    

   
Aldo Nenzi                                                 392,453 (20)         392,453(20)               -
    

Marjorie Oolie                      (3)                    200,000              200,000                   -

   
Sam Oolie                           Director               715,000 (9)          550,000             165,000
    

Oolie Enterprises                   (3)                     21,280               21,280                   -

Oolie Family Support Foundation     (3)                     10,000               10,000                   -

   
Optimum Fund                                               588,679 (20)         588,679 (20)              -

Michael J. Parrella                 President, Chief    10,250,333 (10)       1,125,833           9,124,500 (10)
                                    Executive Officer
                                    And Director
                          
    
                        
   
Primecap Management Group                                  588,679 (20)         588,679 (20)              -

Rossmore Enterprises                                        98,113 (20)          98,113 (20)              -
Money Purchase

Sage Capital                                                98,113 (20)          98,113 (20)              -
Investments Limited

Carole Salkind                     (4)                   9,542,143            6,857,143 (15)      2,685,000

Seagrove, Inc.                                              49,057 (20)          49,057 (20)              -

The Second Cup, Ltd.                                       392,453 (20)         392,453 (20)              -

Karen D. Seeman                                             49,057 (20)          49,057 (20)              -

Selday Investments LTD                                     196,226 (20)         196,226 (20)              -
    
   

Silenus Limited                                          1,962,264 (20)       1,962,264 (16)(20)          -
    
       
   
Philip Santo Sirianni, TTEE,                               196,226 (20)         196,226 (20)              -
The Sirianni-Jersey Trust

Sovereign Partners, LP                                   3,433,962 (20)       3,433,962 (17)(20)          -
    
       
Jay Smith                                                  392,453 (19)         392,453 (19)              -

   
Thomson Kernaghan & Co. Ltd.                             2,747,170 (19)       2,747,170 (18)(19)          -
    

Rolf Towe                                                  150,000              150,000                   -

   
Tricaster Management, Inc.                                 294,340 (20)         294,340 (20)              -

Verity Group, plc                                        3,850,000            3,850,000 (19)              -
    

Luc Verschueren                                             25,000               25,000                   -

Eldon W. Ziegler, Jr.                                      145,250              125,000              20,250

   
Zooley Services Limited                                    196,226 (20)         196,226 (20)              -
    

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

                                                        63,766,621           45,761,613          18,005,008
     
                                                      ============          ===========         ===========
</TABLE>

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

   
(1)  Includes  shares  issuable  upon  exercise  of  non-contingent,   currently
     outstanding  options  and  warrants.  The table does not include any shares
     held in Alexander,  Wescott & Co., Inc.'s, First Atlanta Securities,  LLC's
     or J.P. Carey,  Inc.'s trading  accounts or any customer account over which
     either of them has discretion.
    

(2)  Represents  a person who was either an officer or a director of the Company
     within three years of the date hereof or an affiliate thereof.

(3)  An affiliate of Sam Oolie, a director of the Company.

(4)  The wife of Morton Salkind, a director of the Company.

   
(5)  Includes  750,000 shares  issuable upon  contingent  currently  outstanding
     options.

(6)  Includes  325,000 shares  issuable upon  contingent  currently  outstanding
     options.

(7)  Includes  175,000 shares  issuable upon  contingent  currently  outstanding
     options.

(8)  Includes  200,000 shares  issuable upon  contingent  currently  outstanding
     options.

(9)  Includes  200,000 shares  issuable upon  contingent  currently  outstanding
     options.

(10) Includes  7,500,000 shares issuable upon contingent  currently  outstanding
     options.

(11) Includes  1,000,000 shares issuable upon contingent  currently  outstanding
     options.

(12) Upon  completion of the offering the Selling  Stockholder  will own 1.2% of
     the Company's issued and outstanding Common Stock.

(13) Upon  completion of the offering the Selling  Stockholder  will own 2.8% of
     the Company's issued and outstanding Common Stock.

(14) Upon  completion of the offering the Selling  Stockholder  will own 2.0% of
     the Company's issued and outstanding Common Stock.

(15) Upon  completion of the offering the Selling  Stockholder  will own 3.8% of
     the Company's issued and outstanding Common Stock.

(16) Upon  completion of the offering the Selling  Stockholder  will own 1.1% of
     the Company's issued and outstanding Common Stock.

(17) Upon  completion of the offering the Selling  Stockholder  will own 1.9% of
     the Company's issued and outstanding Common Stock.

(18) Upon  completion of the offering the Selling  Stockholder  will own 1.5% of
     the Company's issued and outstanding Common Stock.

(19) Upon  completion of the offering the Selling  Stockholder  will own 2.2% of
     the Company's issued and outstanding Common Stock.

(20) Based on each Selling Stockholder's pro rata share of the maximum number of
     shares of Common  Stock  which  the  Company  is  obligated  to issue  upon
     conversion of the Preferred Stock under the Subscription  Agreements.  Such
     pro rata share has been determined for each Selling Stockholder by dividing
     the  number  of  shares  of  Preferred   Stock  acquired  by  such  Selling
     Stockholder by the total number of shares of Preferred  Stock issued in the
     1997 Preferred Stock Private  Placement.  The number of shares of Preferred
     Stock issued upon conversion to any particular  Selling  Stockholder may be
     more or less than the amount shown  depending on (i) the length of time the
     Preferred Stock is held, (ii) the conversion  price as determined under the
     Conversion Formula, and (iii) the application of the 26,000,000 share limit
     on the Company's obligation to issue shares of Common Stock upon conversion
     of the Preferred Stock.
    




<PAGE>


                          PLAN OF DISTRIBUTION

   The Company has been  advised by the Selling  Stockholders  that there are no
underwriting  arrangements  with  respect to the sale of the  shares,  that such
shares  will be sold from time to time in public  sales in the  over-the-counter
market at then prevailing prices or at prices related to the then current market
price or in private transactions at negotiated prices. The shares offered hereby
may be sold by one or more of the following methods,  without limitation:  (a) a
block  trade in which a broker or dealer so  engaged  will  attempt  to sell the
shares as agent but may  position and resell a portion of the block as principal
to facilitate the transaction;  (b) purchases by a broker or dealer as principal
and resale by such broker or dealer for its account pursuant to this Prospectus;
(c)  ordinary  brokerage  transactions  and  transactions  in which  the  broker
solicits  purchasers;  and (d)  face-to-face  transactions  between  sellers and
purchasers  without a  broker-dealer.  In  effecting  sales,  brokers or dealers
engaged by the Selling  Stockholders may arrange for other brokers or dealers to
participate.  Such broker or dealers may receive  commissions  or discounts from
Selling  Stockholders in amounts to be negotiated.  Such brokers and dealers and
any other  participating  brokers or dealers may be deemed to be  "underwriters"
within the meaning of the Act, in connection  with such sales.  Shares of Common
Stock  offered  hereby  may be  used to  cover  short  sales  or  other  hedging
transactions.  From time to time, one or more of the Selling  Stockholders named
herein may pledge,  hypothecate  or grant a security  interest in some or all of
the Shares owned by them, and the pledgees,  secured  parties or persons to whom
such securities have been  hypothecated  shall, upon foreclosure in the event of
default, be deemed to be Selling Stockholders for purposes hereof.




<PAGE>


                             LEGAL MATTERS

   
   Matters  relating to the legality of 41,249,786  shares of Common Stock being
offered by this  Prospectus  have been  passed  upon for the  Company by John B.
Horton, Esquire, Senior Vice President and General Counsel of the Company. As of
May 5,  1998,  Mr.  Horton  owned  20,000  shares of Common  Stock,  subject  to
acquisition upon the exercise of currently exercisable  warrants,  20,000 shares
of which are being  offered by this  Prospectus.  In addition,  Mr.  Horton owns
539,417 shares subject to acquisition upon the exercise of currently exercisable
options  granted  to him under the 1992 Plan none of which are being  offered by
this  Prospectus.  Matters  relating to the legality of the remaining  4,890,721
shares of Common Stock offered by this  Prospectus have been passed upon for the
Company by Parker Duryee Rosoff & Haft, a  professional  corporation,  New York,
New York.  Jay M. Haft,  a former  member of and  presently of counsel to Parker
Duryee  Rosoff & Haft,  is Chairman of the Board of Directors  and a director of
the Company and as of May 5, 1998 was the beneficial  owner of 1,532,000  shares
of Common Stock,  including  1,282,000  shares subject to  acquisition  upon the
exercise of currently exercisable warrants and options,  468,500 shares of which
are being offered by this Prospectus. 
    


                                EXPERTS

   
   The consolidated financial statements of the Company at December 31, 1996 and
1997 and for the  years  ended  December  31,  1995,  1996 and 1997 the  related
financial  statement schedule  incorporated into this prospectus by reference to
the Company's  Annual Report on Form 10-K for the fiscal year ended December 31,
1997  (including  Amendment No. 1 thereto filed on April 30, 1998, and Amendment
No. 2 thereto  filed on May 4, 1998),  have been  audited by Richard A. Eisner &
Company,  LLP,  Independent  Auditors,  as set  forth in their  report  included
therein  (which  contains an  explanatory  paragraph  relating to the  Company's
inability  to  continue as a going  concern)  and have been so  incorporated  in
reliance  upon such reports  given upon the authority of such firm as experts in
auditing and accounting. 
    




<PAGE>


                                   PART II

                    INFORMATION NOT REQUIRED IN PROSPECTUS

Item 14.    Other Expenses of Issuance and Distribution

   
      The  following  table sets  forth the  estimated  expenses  payable by the
registrant  with respect to the offering  described in this  Amendment  No. 1 to
Registration Statement:

Securities and Exchange Commission  registration fee                 $10,609
Legal Fees and expenses                                               18,000 *
Accounting fees and expenses                                          20,000 *
Miscellaneous expenses                                                   500 *
    
                                                   ------------  ------------

   
Total                                                                $49,109 *
    
                                                   ============  ============
- -------------
* Estimated

       

<PAGE>


Item 16.    Exhibits (listed  according to the number assigned in the table in
Item 601 of Regulation S-K)

   
      The  following  exhibits are included as a part of this  Amendment No. 1
to Registration Statement:
    

 Exhibit No.                          Description
   
      5          Opinion of John B. Horton,  Esquire,  Senior Vice President and
                 General  Counsel of the  registrant,  as to the legality of the
                 Common  Stock to which  this  Amendment  No. 1 to  Registration
                 Statement relates.

    23(a)        Consent of Richard A. Eisner & Company, LLP

    23(b)        Consent of Peters Elworthy & Moore

    23(c)        Consent of John B. Horton, Esquire (contained in Exhibit 5)

      24         Powers of Attorney*
- -------------

* Previously filed
    

       

<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 Amendment No. 1 to
Registration Statement to be signed on its behalf by the undersigned,  thereunto
duly authorized, in Linthicum, Maryland, on this 8th day of May, 1998.
    

                              NOISE CANCELLATION TECHNOLOGIES, INC.


                              By:   /s/ MICHAEL J. PARRELLA
                                    -------------------------------
                                    Michael J. Parrella, President



<PAGE>


   
    Pursuant to the  requirements  of the Securities Act of 1933, this Amendment
No. 1 to Registration  Statement has been signed by the following persons in the
capacities and on the dates indicated.
    

      Signatures                    Capacity                         Date

   
/s/ MICHAEL J. PARRELLA    President (Principal Executive            May 8, 1998
- -----------------------    Officer) and Director
Michael J. Parrella    


/s/ CY E. HAMMOND          Senior Vice President and                 May 8, 1998
- -----------------------    Chief Financial Officer
Cy E. Hammond              (Principal Financial and
                           Accounting Officer
    


   
/s/ JAY M. HAFT            Chairman of the Board of Directors        May 8, 1998
- -----------------------    and Director
Jay M. Haft        


/s/ JOHN J. McCLOY         Director                                  May 8, 1998
- -----------------------
John J. McCloy


/s/ SAM OOLIE              Director                                  May 8, 1998
- -----------------------
Sam Oolie


/s/ STEPHAN CARLQUIST      Director                                  May 8, 1998
- -----------------------
Stephan Carlquist


/s/ MORTON SALKIND         Director                                  May 8, 1998
- -----------------------
Morton Salkind
    




<PAGE>


                                EXHIBIT INDEX

                                                                     Sequential
Exhibit No.             Description                                  Page Number

   
        5               Opinion of John B. Horton, Esquire,               60
                        Senior Vice President and General Counsel
                        of the registrant, as to the legality of the
                        Common Stock to which this Amendment No. 1
                        to Registration Statement relates
    
       
   
       23(a)            Consent of Richard A. Eisner & Company, LLP       61

       23(b)            Consent of Peters Elworthy & Moore                62

       23(c)            Consent of John B. Horton, Esquire 
                        (contained in Exhibit 5)

       24               Powers of Attorney*
- -----------

* Previously filed
    







                                                                       Exhibit 5

   
                                    May 8, 1998
    


Noise Cancellation Technologies, Inc.
1025 West Nursery Road, Suite 120
Linthicum, Maryland  21090

   
      Re:   Amendment No. 1 to Registration Statement on Form S-3
    

Gentlemen:

   
      Referring to  Amendment  No. 1 to the  Registration  Statement on Form S-3
that Noise Cancellation Technologies,  Inc. (the "Company") is filing today with
the  Securities  and Exchange  Commission  under the  Securities Act of 1933, as
amended,  relating  to the sale by  certain  Selling  Stockholders  of shares of
Common  Stock of the  Company  (the  "Resale  Shares")  and the sale to  certain
persons not deemed  "affiliates"  of the Company,  as that term is defined under
the Securities Act of 1933, as amended, of 378,894 shares of Common Stock of the
Company upon the exercise of outstanding warrants and options to purchase Common
Stock (the "Warrant and Option Shares"), I am of the opinion that:
    

1. The Resale Shares have been duly authorized by the Company, have been validly
issued and are fully paid and nonassessable.

2. The Warrant and Option  Shares have been duly  authorized by the Company and,
when issued and delivered in accordance with the terms of the respective warrant
or option agreements governing such warrants or options, will be validly issued,
fully paid and nonassessable.

   
      I hereby  consent to the filing of this  opinion with the  Securities  and
Exchange  Commission as Exhibit No. 5 to the Amendment No. 1 to the Registration
Statement  referred to above and to the reference to me under the caption "Legal
Matters" in the Prospectus. 
    

                                Very truly yours,


                                /s/ JOHN B. HORTON
                                ------------------
                                John B. Horton
                                Senior Vice President and
                                General Counsel






Exhibit 23(a)

                       CONSENT OF INDEPENDENT AUDITORS


   
We consent to the  incorporation by reference to the  Registration  Statement on
Form  S-3  Amendment  No.  1 of our  report  dated  February  27,  1998,  on the
consolidated   financial   statements   and   schedule  of  Noise   Cancellation
Technologies, Inc. (the "Company") as at December 31, 1997 and December 31, 1996
and for each of the years in the  three-year  period  ended  December  31, 1997,
included in the  Company's  Annual Report on Form 10-K (as amended) for the year
ended  December  31,  1997,  and to the  reference to the firm under the caption
"Experts" included in the Prospectus.


/s/ RICHARD A. EISNER & COMPANY, LLP
Richard A. Eisner & Company, LLP

New York, New York
May 5, 1998
    









   
Exhibit 23(b)



April 29, 1998

Noise Cancellation Technologies, Inc.
1025 West Nursery Road, Suite 120
Linthicum, MD  21090

Dear Sirs:

We consent to the incorporation in Registration Statement on form S-3, Amendment
No.  1 of  our  opinion  on  the  financial  statements  of  Noise  Cancellation
Technologies  (UK) Limited as of December 31, 1997 and December 31, 1996 and for
each of the three years ended  December 31, 1997,  included in the Annual Report
on Form 10-K/A.

Yours faithfully,

/s/ PETERS ELWORTHY & MOORE
Peters Elworthy & Moore
    





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