NOISE CANCELLATION TECHNOLOGIES INC
8-K, 1997-02-25
MISCELLANEOUS ELECTRICAL MACHINERY, EQUIPMENT & SUPPLIES
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                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549



                                    FORM 8-K



                                 CURRENT REPORT


                       Pursuant to Section 13 or 15(d) of
                       the Securities Exchange Act of 1934


         Date of Report (Date of earliest event reported): February 10 , 1997
- -----------------------------------------------------------------------------

                      Noise Cancellation Technologies, Inc.
- -----------------------------------------------------------------------------
               (Exact name of Registrant as specified in Charter)


     Delaware                0-18267                      59-2501025
(State or other juris-       (Commission                  (IRS Employer
diction of incorporation)    File Number)                 Identification
                                                          Number)

1025 West Nursery Road, Suite 120, Linthicum, Maryland       2 1 0 9 0
(Address of principal executive offices)                     (Zip Code)

Registrant's telephone number including area code:          (410) 636-8700


                                      None
- -----------------------------------------------------------------------------
           Former name or former address, if changes since last report)




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 Item 7. Exhibits

                                                                   Sequential
Exhibit No.       Description                                         Page

1(a)              Agreement dated December 10, 1996, between
                  Noise Cancellation Technologies, Inc. and
                  Schwebel Capital Investments, Inc. incorporated
                  by reference to Exhibit 1(a) of Registrant's
                  Report on Form 8-K filed on January 27, 1997.

1(b)              Agreement dated December 10, 1996, between
                  Noise Cancellation Technologies, Inc. and
                  Alexander Wescott and Co., Inc. incorporated
                  by reference to Exhibit 1(b) of Registrant's
                  Report on Form 8-K filed on January 27, 1997.

4(a)              Form of Noise Cancellation Technologies, Inc.        8
                  8% Convertible Debenture due February 7, 2000.
                  Issued on February 10, 1997, to Sage Capital
                  Investments Limited.

4(b)              Form of Noise Cancellation Technologies, Inc.       17
                  8% Convertible Debenture due February 21, 2000.
                  Issued on February 21, 1997, to Sage Capital
                  Investments Limited.

4(c)              Form of Noise Cancellation Technologies, Inc.       26
                  8% Convertible Debenture due February 21, 2000.
                  Issued on February 21, 1997, to Optimum Fund.










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Item 9.  Sales of Equity Securities Pursuant to Regulation S

FIRST SALE

(a) February 10, 1997.  Eight Percent (8%) Non-Voting  Subordinated  Convertible
Debentures Due February 7, 2000, each in the principal  amount of fifty thousand
dollars ($50,000.00) (the "Debentures").  Aggregate principal amount of one 
hundred thousand dollars ($100,000.00).

(b) Name of  placement  agents -  Alexander,  Wescott & Co.,  Inc.  and Schwebel
Capital  Investments,  Inc.  Identity of person to which the Registrant sold the
Debentures   -  Sage  Capital   Investments   Limited,   Nassau,   Bahamas  (the
"Purchaser").

(c) Total offering price - one hundred  thousand  dollars  ($100,000.00).  Total
commissions - eleven thousand dollars ($11,000.00).

(d) Exemption from registration claimed under Regulation S promulgated under the
Securities Act of 1933, as amended (respectively, "Regulation S" and the "Act").
To the best of the  Registrant's  knowledge  and belief and in  accordance  with
representations  and  warranties  made by the Purchaser of the  Debentures,  the
Purchaser is not a "U.S.  Person" as defined under  Regulation S, the Registrant
did not engage in any "directed  selling  efforts" as defined under Regulation S
in connection  with the offer or sale of the  Debentures and said offer and sale
complied in all other  respects with the  provisions of Regulation S required to
permit the sale of the Debentures by the Registrant  without compliance with the
registration requirements of the Act.

(e) The  holder  of the  Debentures  is  entitled,  at its  option,  at any time
commencing  on or after  forty-five  (45)  days  after the  closing  date of the
purchase  thereof  (the  "Closing  Date") to convert the full  unpaid  principal
amount of the  Debentures  into shares of Common  Stock of the  Registrant  (the
"Conversion  Shares") at a conversion  price (the  "Conversion  Price") for each
Conversion Share equal to the lesser of eighty-five percent (85%) of the closing
bid of the Common  Stock on the  Closing  Date or seventy  percent  (70%) of the
average  closing bid price of the Common  Stock for the five (5) NASDAQ  trading
days  immediately  preceding  the date of conversion as reported by the National
Association of Securities Dealers Automated Quotation System; provided, however,
that in no event shall the  Conversion  Price ever be less than $0.14 per share.
The number of Conversion Shares to be received by the holder on conversion shall
be the product of the unpaid  principal amount of the Debentures being converted
divided by the Conversion  Price.  The Registrant may, at its own option,  cause
the  automatic  conversion  into  Conversion  Shares  of all or any  part of the
Debentures  after  February  15, 1998 at the  aforesaid  Conversion  Price.  The
Registrant  may exercise  its option to cause the  automatic  conversion  as set
forth herein after sixty (60) days notice to the holder  during which sixty (60)
days  the  holder  may  convert  in  accordance  with  the  holder's  conversion
privileges.  After  the  sixty  (60)  days and the  exercise  of said  automatic
conversion,  Registrant may only exercise  further  automatic  conversion(s)  in
connection  with not less than  twenty-five  percent (25%) of the then remaining
amounts of outstanding  Conversion  Shares  pertaining to all of the unconverted
Debentures  per automatic  conversion  and only after thirty (30) days notice to
the holder  during which  thirty (30) days the holder may convert in  accordance
with the  holder's  conversion  privileges.  Payment  of each  interest  payment
payable under the Debentures may, at the Registrant's option, be made in cash or
by delivery of shares of the Registrant's  Common Stock. The number of shares to
be delivered shall be based on one hundred percent (100%) of the average closing
bid price of the  Registrant's  Common  Stock as reported on NASDAQ for the Five
(5) Trading Days immediately preceding the record date for the interest payment.

SECOND SALE

(a) February 21, 1997.  Eight Percent (8%) Non-Voting  Subordinated  Convertible
Debentures Due February 21, 2000, each in the principal amount of fifty thousand
dollars ($50,000.00) (the "Debentures").  Aggregate principal amount of one 
hundred thousand dollars ($100,000.00).

(b) Name of  placement  agents -  Alexander,  Wescott & Co.,  Inc.  and Schwebel
Capital  Investments,  Inc.  Identity of person to which the Registrant sold the
Debentures   -  Sage  Capital   Investments   Limited,   Nassau,   Bahamas  (the
"Purchaser").

(c) Total offering price - one hundred  thousand  dollars  ($100,000.00).  Total
commissions - eleven thousand dollars ($11,000.00).

(d) Exemption from registration claimed under Regulation S promulgated under the
Securities Act of 1933, as amended (respectively, "Regulation S" and the "Act").
To the best of the  Registrant's  knowledge  and belief and in  accordance  with
representations  and  warranties  made by the Purchaser of the  Debentures,  the
Purchaser is not a "U.S.  Person" as defined under  Regulation S, the Registrant
did not engage in any "directed  selling  efforts" as defined under Regulation S
in connection  with the offer or sale of the  Debentures and said offer and sale
complied in all other  respects with the  provisions of Regulation S required to
permit the sale of the Debentures by the Registrant  without compliance with the
registration requirements of the Act.

(e) The  holder  of the  Debentures  is  entitled,  at its  option,  at any time
commencing  on or after  forty-five  (45)  days  after the  closing  date of the
purchase  thereof  (the  "Closing  Date") to convert the full  unpaid  principal
amount of the  Debentures  into shares of Common  Stock of the  Registrant  (the
"Conversion  Shares") at a conversion  price (the  "Conversion  Price") for each
Conversion Share equal to the lesser of eighty-five percent (85%) of the closing
bid of the Common  Stock on the  Closing  Date or seventy  percent  (70%) of the
average  closing bid price of the Common  Stock for the five (5) NASDAQ  trading
days  immediately  preceding  the date of conversion as reported by the National
Association of Securities Dealers Automated Quotation System; provided, however,
that in no event shall the  Conversion  Price ever be less than $0.14 per share.
The number of Conversion Shares to be received by the holder on conversion shall
be the product of the unpaid  principal amount of the Debentures being converted
divided by the Conversion  Price.  The Registrant may, at its own option,  cause
the  automatic  conversion  into  Conversion  Shares  of all or any  part of the
Debentures  after  February  15, 1998 at the  aforesaid  Conversion  Price.  The
Registrant  may exercise  its option to cause the  automatic  conversion  as set
forth herein after sixty (60) days notice to the holder  during which sixty (60)
days  the  holder  may  convert  in  accordance  with  the  holder's  conversion
privileges.  After  the  sixty  (60)  days and the  exercise  of said  automatic
conversion,  Registrant may only exercise  further  automatic  conversion(s)  in
connection  with not less than  twenty-five  percent (25%) of the then remaining
amounts of outstanding  Conversion  Shares  pertaining to all of the unconverted
Debentures  per automatic  conversion  and only after thirty (30) days notice to
the holder  during which  thirty (30) days the holder may convert in  accordance
with the  holder's  conversion  privileges.  Payment  of each  interest  payment
payable under the Debentures may, at the Registrant's option, be made in cash or
by delivery of shares of the Registrant's  Common Stock. The number of shares to
be delivered shall be based on one hundred percent (100%) of the average closing
bid price of the  Registrant's  Common  Stock as reported on NASDAQ for the Five
(5) Trading Days immediately preceding the record date for the interest payment.

THIRD SALE

(a)  February  21,  1997.   Eight  Percent  (8%)  Non-Voting   Subordinated
Convertible  Debentures  Due February 21, 2000,  four (4) in the  principal
amount of fifty thousand dollars  ($50,000.00) and one (1) in the principal
amount of twenty-five  thousand dollars  ($25,000.00)  (the  "Debentures").
Aggregate  principal  amount of two hundred  twenty-five  thousand  dollars
($225,000.00).

(b) Name of  placement  agents -  Alexander,  Wescott & Co.,  Inc.  and Schwebel
Capital  Investments,  Inc.  Identity of person to which the Registrant sold the
Debentures - Optimum  Fund,  Georgetown,  Grand  Cayman,  Grand  Cayman  Island,
British Virgin Islands (the "Purchaser").

(c)  Total  offering   price  -  two  hundred   twenty-five   thousand   dollars
($225,000.00).  Total  commissions  - twenty-four  thousand  seven hundred fifty
dollars ($24,750.00).

(d) Exemption from registration claimed under Regulation S promulgated under the
Securities Act of 1933, as amended (respectively, "Regulation S" and the "Act").
To the best of the  Registrant's  knowledge  and belief and in  accordance  with
representations  and  warranties  made by the Purchaser of the  Debentures,  the
Purchaser is not a "U.S.  Person" as defined under  Regulation S, the Registrant
did not engage in any "directed  selling  efforts" as defined under Regulation S
in connection  with the offer or sale of the  Debentures and said offer and sale
complied in all other  respects with the  provisions of Regulation S required to
permit the sale of the Debentures by the Registrant  without compliance with the
registration requirements of the Act.

(e) The  holder  of the  Debentures  is  entitled,  at its  option,  at any time
commencing  on or after  forty-five  (45)  days  after the  closing  date of the
purchase  thereof  (the  "Closing  Date") to convert the full  unpaid  principal
amount of the  Debentures  into shares of Common  Stock of the  Registrant  (the
"Conversion  Shares") at a conversion  price (the  "Conversion  Price") for each
Conversion Share equal to the lesser of eighty-five percent (85%) of the closing
bid of the Common  Stock on the  Closing  Date or seventy  percent  (70%) of the
average  closing bid price of the Common  Stock for the five (5) NASDAQ  trading
days  immediately  preceding  the date of conversion as reported by the National
Association of Securities Dealers Automated Quotation System; provided, however,
that in no event shall the  Conversion  Price ever be less than $0.14 per share.
The number of Conversion Shares to be received by the holder on conversion shall
be the product of the unpaid  principal amount of the Debentures being converted
divided by the Conversion  Price.  The Registrant may, at its own option,  cause
the  automatic  conversion  into  Conversion  Shares  of all or any  part of the
Debentures  after  February  15, 1998 at the  aforesaid  Conversion  Price.  The
Registrant  may exercise  its option to cause the  automatic  conversion  as set
forth herein after sixty (60) days notice to the holder  during which sixty (60)
days  the  holder  may  convert  in  accordance  with  the  holder's  conversion
privileges.  After  the  sixty  (60)  days and the  exercise  of said  automatic
conversion,  Registrant may only exercise  further  automatic  conversion(s)  in
connection  with not less than  twenty-five  percent (25%) of the then remaining
amounts of outstanding  Conversion  Shares  pertaining to all of the unconverted
Debentures  per automatic  conversion  and only after thirty (30) days notice to
the holder  during which  thirty (30) days the holder may convert in  accordance
with the  holder's  conversion  privileges.  Payment  of each  interest  payment
payable under the Debentures may, at the Registrant's option, be made in cash or
by delivery of shares of the Registrant's  Common Stock. The number of shares to
be delivered shall be based on one hundred percent (100%) of the average closing
bid price of the  Registrant's  Common  Stock as reported on NASDAQ for the Five
(5) Trading Days immediately preceding the record date for the interest payment.





<PAGE>


                                   SIGNATURES


         Pursuant to the  requirements  of the Securities  Exchange Act of 1934,
the  registrant  has duly  caused  this report to be signed on its behalf by the
undersigned hereunto duly authorized.

                           NOISE CANCELLATION TECHNOLOGIES, INC.


                           By: /s/ STEPHEN J. FOGARTY
                               Stephen J. Fogarty
                               Senior Vice President and
                               Chief Financial Officer

Dated:  February 25, 1997







<PAGE>


- -----------------------------------------------------------------------------
EXHIBIT 4(a)
- -----------------------------------------------------------------------------

No.  ___                                                        USD$50,000.00

                      NOISE CANCELLATION TECHNOLOGIES, INC.

                  8% CONVERTIBLE DEBENTURE DUE February 7, 2000

THE DEBENTURE  REPRESENTED BY THIS CERTIFICATE AND THE SECURITIES  ISSUABLE UPON
CONVERSION  HEREOF HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS
AMENDED.  THE  DEBENTURE  HAS BEEN  ACQUIRED  FOR  INVESTMENT  AND NEITHER  THIS
DEBENTURE  NOR THE  SECURITIES  ISSUABLE  UPON  CONVERSION  HEREOF  MAY BE SOLD,
TRANSFERRED  OR ASSIGNED IN THE ABSENCE OF AN EFFECTIVE  REGISTRATION  STATEMENT
FOR THE DEBENTURE OR SUCH  SECURITIES,  AS THE CASE MAY BE, UNDER THE SECURITIES
ACT OF 1933, AS AMENDED,  OR AN OPINION OF COUNSEL IN FORM,  SUBSTANCE AND SCOPE
REASONABLY ACCEPTABLE TO THE ISSUER THAT REGISTRATION IS NOT REQUIRED UNDER SAID
ACT OR  UNLESS  SOLD  PURSUANT  TO RULE 144  UNDER  SAID  ACT.  ANY  SUCH  SALE,
ASSIGNMENT OR TRANSFER MUST ALSO COMPLY WITH APPLICABLE STATE SECURITIES LAW.

THIS  DEBENTURE  is  one of a duly  authorized  issue  of  Debentures  of  NOISE
CANCELLATION TECHNOLOGIES, INC., a corporation duly organized and existing under
the laws of the State of Delaware (the "Issuer") designated as its Eight Percent
(8%) Non-Voting Subordinated  Convertible Debentures due FEBRUARY 7, 2000, in an
aggregate  principle  amount of One Hundred Thousand United States Dollars
(USD$100,000.00).

FOR VALUE RECEIVED, the Issuer promises to pay to

                            Sage Capital Investments Limited
                            P.O. Box N-4826
                            Marron House
                            Virginia Street
                            Nassau, Bahamas

the registered holder hereof and its successors and assigns (the "Holder"), the 
principle sum of

                                 FIFTY THOUSAND
                      UNITED STATES DOLLARS (USD$50,000.00)

                                       on
                                February 7, 2000
                             (the "Maturity Date"),



<PAGE>



and to pay  interest  on the  principle  sum  outstanding  at the  rate of Eight
Percent (8%) per annum due and payable on March 31st, June 30th,  September 30th
and December 31st of each year until maturity. Interest shall begin to accrue on
the closing date applicable to the issuance of this Debenture as provided in the
"Subscription  Agreement"  defined below (the "Closing  Date").  Payment of each
interest payment may, at the Issuer's option,  be made in cash or by delivery of
the shares of the Issuer's Common Stock ("Common  Stock").  The number of shares
to be  delivered  shall be based on one  hundred  percent  (100%) of the average
closing  bid price of the  Issuer's  Common  Stock as reported on NASDAQ for the
Five (5) Trading  Days  immediately  preceding  the record date for the interest
payment.  The  interest so payable will be paid to the person in whose name this
Debenture is registered on the record of the Issuer  regarding  registration and
transfers of the Debenture (the "Debenture Register");  provided,  however, that
the Issuer's  obligation to a transferee of this  Debenture  arises only if such
transfer,  sale or other  disposition  is made in accordance  with the terms and
conditions of the Offshore Debenture Securities  Subscription Agreement dated as
of  December  13,  1996  between  the Issuer and the Holder  (the  "Subscription
Agreement"). The principle of, and interest of this Debenture (to the extent not
payable by delivery of shares of Issuer's  Common Stock in  accordance  with the
terms  thereof)  are payable in such coin or  currency  of the United  States of
America  as at the time of payment  is legal  tender  for  payment of public and
private debts,  at the address last  appearing on the debenture  Register of the
Issuer as  designated  in writing by the Holder  hereof  from time to time.  The
Issuer will pay the  principal of and accrued and unpaid  interest due upon this
debenture on the Maturity Date, less any amounts  required by law to be deducted
or withheld,  to the Holder at the last address on the Debenture  Register.  The
receipt of such check or shares of Common  Stock shall  constitute  a payment of
principal  and interest  hereunder and shall satisfy and discharge the liability
for  principal  and  interest  on  this  Debenture  to the  extent  of  the  sum
represented  by such  check or  shares  of  Common  Stock  plus any  amounts  so
deducted.

This Debenture is subject to the following additional provisions:

1.       The Debentures  are issuable in  denominations  of Fifty Thousand  
         United States Dollars(USD$50,000.00).

2.       The Issuer shall be entitled to withhold from all payments of principle
         of, and interest on, this  Debenture  any amounts  required to withheld
         under the  applicable  provisions  of the United  States  income tax or
         other applicable laws at the time of such payments.

3.        This  Debenture  has been  issued  subject  to  investment  and  other
          representations  of the  original  Holder  hereof  as set forth in the
          Subscription  Agreement  and may be  transferred  or  exchanged in the
          United States only in compliance  with the  Securities Act of 1933, as
          amended (the "Act") and applicable state securities laws. Prior to the
          due presentment  for such transfer of this  Debenture,  the Issuer and
          any  agent of the  Issuer  may treat  the  person  in whose  name this
          Debenture is duly registered on the Issuer's Debenture Register as the
          owner hereof for the purpose of receiving  payment as provided and all
          other purposes,  whether or not this Debenture be overdue, and neither
          the Issuer nor any agent shall be affected by notice to contrary.

4.        The Holder of this  Debenture is entitled,  at its option,  at
          any time commencing on or after forty-five (45) days after the Closing
          Date to convert the full  unpaid  principle  amount of this  Debenture
          into shares of Common Stock of the Issuer (the "Conversion Shares") at
          a conversion price (the "Conversion  Price") for each Conversion Share
          equal to the lesser of eighty-five percent (85%) of the closing bid of
          the Common Stock on the Closing Date or seventy  percent  (70%) of the
          average  closing bid price of the Common Stock for the five (5) NASDAQ
          Trading Days immediately preceding the Conversion Date (as hereinafter
          defined),  as  reported  by the  National  Association  of  Securities
          Dealers Automated  Quotation  System.  Provided,  however,  that in no
          event  shall the  Conversion  Price ever be less than $0.14 per share.
          The number of Conversion Shares to be received by Holder on conversion
          shall be the product of the unpaid  principal  amount of the Debenture
          being converted  divided by the Conversion  Price. On the Closing Date
          as defined in the Subscription  Agreement,  the Issuer will reserve on
          its books three hundred  seventy-five thousand (375,000)
          shares of Common Stock for use in  connection  with  conversion of the
          Debentures.  The Issuer does hereby  irrevocably agree to instruct its
          Transfer  Agent to  provide  Common  Stock  Certificates  representing
          Conversion  Shares  to the  Holder  in  accordance  with the  terms of
          conversion  hereinafter  set out. Holder shall not sell any Conversion
          Shares so converted until forty-five (45) days after the Closing Date.
          Such  conversion  by the  Holder  shall  be  effected  by  the  Holder
          surrendering  to the Issuer this Debenture with the form of Conversion
          Notice  attached  hereto as Exhibit 1,  executed by the Holder of this
          Debenture  and  accompanied,  if  required  by the  Issuer,  by proper
          assignment  hereof in blank delivered in the manner and time period as
          hereinafter set out. The Issuer shall then instruct its Transfer Agent
          to deliver the appropriate Common Stock Certificate to the Holder. For
          purposes of this Debenture,  the "Conversion  Date" shall be deemed to
          be the date on which the Holder has sent by facsimile the executed and
          completed Conversion notice together with a copy of this Debenture and
          any applicable executed assignment to the Issuer. In order to convert,
          this  Debenture  together  with the  Original  Conversion  Notice duly
          executed,  must be delivered by express  courier to the Issuer  within
          Two (2) NASDAQ  Trading Days of the  Conversion  Date.  The Conversion
          Shares must be issued and returned by the Transfer Agent to the Holder
          by  express  courier  with  Five (5)  NASDAQ  Trading  Days  after the
          Conversion  Date.  Accrued but unpaid interest shall, at the option of
          the Issuer,  be subject to conversion  under the terms and  conditions
          concerning  the  payment of  interest  set forth  above at the time of
          conversion  of this  Debenture or at the time any  quarterly  interest
          payments  are  due.  No  fractional   shares  or  scrip   representing
          fractional  shares  will be issued on  conversion,  but the  number of
          shares  issuable  shall be rounded to the  nearest  whole  share.  The
          Issuer may, at its own option,  cause the  automatic  conversion  into
          Conversion  Shares of the full unpaid amount of this  Debenture  after
          February 15, 1998 at the aforesaid  Conversion  Price.  The Issuer may
          exercise  its option to cause the  automatic  conversion  as set forth
          herein after said sixty (60) days notice to Holder  during which sixty
          (60) days Holder may convert in accordance  with  Holder's  conversion
          privileges  hereunder.  After the sixty (60) days and the  exercise of
          said automatic conversion,  Issuer may only exercise further automatic
          conversion(s)  in connection  with not less than  twenty-five  percent
          (25%) of the then remaining  amounts of outstanding  Conversion Shares
          pertaining  to  all  of  the  unconverted   Debentures  per  automatic
          conversion  and only after  thirty (30) days  notice to Holder  during
          which thirty (30) days Holder may convert in accordance  with Holder's
          conversion  privileges  hereunder.  The  option  shall be  effectively
          exercised  on the date on which  the  Issuer  transmits  by  facsimile
          transmission  and mails notice of said  conversion  to the  registered
          Holder of the effected  Debentures.  To effect such  conversion by the
          Issuer,  the  Conversion  Shares must be issued and  delivered  by the
          Transfer Agent to the Holder by express courier on or before the fifth
          (5th)  NASDAQ  Trading  Day after the last day of such  sixty  (60) or
          thirty  (30) day  notice  period,  as the case may be,  or the date on
          which the Holder  notifies  the Issuer  that the Holder  elects not to
          exercise the Holder's conversion privileges hereunder. Upon receipt of
          the  Conversion  Shares and the  payment  (in cash or Common  Stock as
          herein provided) of any unpaid interest,  the Holder shall immediately
          deliver the  Debenture,  appropriately  marked to indicate  payment in
          full thereof,  to the Issuer or its assignee pursuant to Issuer or its
          assignee's instructions.

5.       No provision of this Debenture  shall alter or impair the obligation of
         the Issuer,  which is absolute and unconditional,  to pay the principal
         of, and interest on, this Debenture at the place, time and rate, and in
         the coins or currency, herein prescribed.

6.       The Issuer hereby  expressly waives demand and presentment for payment,
         notice of nonpayment,  protest,  notice of protest, notice of dishonor,
         notice of  acceleration  or intent to accelerate,  bringing of suit and
         diligence in taking any action to collect  amounts called for hereunder
         and shall be directly and primarily  liable for the payment of all sums
         owing and to be owing  hereon,  regardless  of and  without any notice,
         diligence,  act or omission as or with respect to the collection of any
         amount called for hereunder.

7.       The Issuer  agrees to pay all cost and expenses,  including  reasonable
         attorneys'  fees, which may be incurred by the Holder in collecting any
         amount due or exercising the conversion rights under this Debenture.

8.       If one or more of the following described "Events of Default" shall 
         occur:

         (a)      The Issuer  shall  default in the  payment of  principal  or  
                  interest  on this Debenture; or

         (b)      Any of the  representations  or warranties  made by the Issuer
                  herein, in the Subscription  Agreement,  or in any certificate
                  or  financial  or other  statements  heretofore  or  hereafter
                  furnished by or on behalf of the Issuer in connection with the
                  execution and delivery of this  Debenture or the  Subscription
                  Agreement shall be false or misleading in any material respect
                  at the time; or

         (c)      The  Issuer  shall  fail to issue  the  Conversion  Shares  in
                  accordance  with the terms of conversion  set out in Section 4
                  above or to  perform  or  observe  any other  covenant,  term,
                  provision,  condition,  agreement or  obligation of the Issuer
                  under this Debenture and such failure shall  continue  uncured
                  for a period of seven (7) days after notice from the Holder of
                  such failure; or

         (d)      The Issuer  shall (1) become  insolvent;  (2) admit in writing
                  its  inability to pay its debt  generally as they mature;  (3)
                  make an  assignment  for the benefit of  creditors or commence
                  proceedings for its  dissolution;  or (4) apply for or consent
                  to the appointment of a trustee, liquidator or receiver for it
                  or for a substantial part of its property or business; or

         (e)      A trustee,  liquidator or receiver  shall be appointed for the
                  Issuer  or a  substantial  part of its  property  or  business
                  without its consent and shall not be discharged  within thirty
                  (30) days after such appointment; or

         (f)      Any governmental agency or any court of competent jurisdiction
                  at  the  instance  of any  governmental  agency  shall  assume
                  custody or control off the whole or any substantial portion of
                  the  properties  or  assets  of the  Issuer  and  shall not be
                  dismissed within thirty (30) calendar days thereafter; or

         (g)      Bankruptcy,   reorganization,    insolvency   or   liquidation
                  proceedings  or  other   proceedings   for  relief  under  any
                  bankruptcy  law or any law for the relief of debtors  shall be
                  instituted by or against the Issuer, and if instituted against
                  the Issuer, shall not be dismissed within thirty (30) calendar
                  days after such  institution or the Issuer shall by any action
                  or answer  approve of,  consent to, or  acquiesce  in any such
                  proceedings or audit the material  allegations  of, or default
                  in answering a petition filed in such proceeding; or

         (h)      The  Issuer's  Common Stock shall cease to be quoted on any of
                  the  New  York  Stock   Exchange,   American  Stock  Exchange,
                  NASDAQ-National  Market,  NASDAQ-Small  Cap or OTC  Electronic
                  Bulletin  Board for a period in excess of ninety (90) Calendar
                  Days.

         Then,  or at any time  thereafter,  and in each and  every  such  case,
         unless  such Event of Default  shall have been waived in writing by the
         Holder  (which  waiver  shall  not  be  deemed  to be a  waiver  of any
         subsequent  default)  at the option of the  Holder and in the  Holder's
         sole discretion, the Holder may consider this Debenture immediately due
         and  payable,  without  presentment,  demand,  protest or notice of any
         kind, all of which are hereby expressly  waived,  anything herein or in
         any   note   or   other   instruments   contained   to   the   contrary
         notwithstanding, and the Holder may immediately, and without expiration
         of any period of grace,  enforce any and all of the Holder's rights and
         remedies  provided  herein or nay other rights or remedies  afforded by
         law.

9.       No recourse  shall be had for the payment of the principal of,
         or the interest on, this Debenture,  or for any claim based hereon, or
         otherwise in respect hereof,  against any  incorporator,  shareholder,
         officer or director,  as such, past,  present or future, of the Issuer
         or any successor  corporation,  whether by virtue of any constitution,
         statue or rule of law, or by  enforcement by any assessment or penalty
         or otherwise,  all such liability  being, by acceptance  hereof and as
         part of the  consideration  for the issue hereof  expressly waived and
         released.

10.      The  Holder  of  this  Debenture,  by  execution  of  the  Subscription
         Agreement and  acceptance  hereof  agrees that this  Debenture is being
         acquired for  investment  purposes and that such Holder will not offer,
         sell or  otherwise  dispose of this  debenture  or the shares of Common
         Stock issuable upon conversion thereof except under circumstances which
         shall not result in a violation of the Act or any applicable State Blue
         Sky law or similar laws relating to the sale of securities.

11.       By acceptance of this Debenture,  the Holder hereby grants to
          the Issuer or its assignee  the option  ("Prepayment  Option"),  for a
          period  beginning  after  February 15, 1998 to  repurchase  all of the
          outstanding  portion of the  Debenture  plus accrued  interest,  after
          sixty (60) days notice to Holder  during  which sixty (60) days Holder
          may  convert  in  accordance  with  Holder's   conversion   privileges
          hereunder.  The repurchase  price of this  Debenture (the  "Repurchase
          Price")  shall be equal to One Hundred and Five Percent  (105%) of the
          full unpaid principal  amount of the Debenture,  plus accrued interest
          payable in cash.  This  Prepayment  Option may be exercised by written
          notice via telecopy transmission to the Holder (with written notice to
          the registered  address by overnight  courier) after February 15, 1998
          and delivery of the  Repurchase  Monies to the Holder on or before the
          fifth (5th)  NASDAQ  trading day after the last day of such sixty (60)
          day notice period or the date on which the Holder  notifies the Issuer
          that  the  Holder  elects  not to  exercise  the  Holder's  conversion
          privileges  hereunder.  Upon receipt of the Repurchase Monies,  Holder
          shall  immediately  deliver  the  Debenture,  appropriately  marked to
          indicate  payment  in full  thereof,  to the  Issuer  or its  assignee
          pursuant to Issuer's or its assignee's instructions.

12.      In the case  that  there is any  outstanding  amount  of the  Debenture
         unconverted on February 7, 2000, the outstanding unconverted portion of
         the Debenture will be subject to automatic  conversion  pursuant to the
         provisions of the last four sentences in Section 4 hereunder.

13.      In case any provision of this Debenture is held by a court of competent
         jurisdiction  to  be  excessive  in  scope  or  otherwise   invalid  or
         unenforceable  such provision shall be adjusted rather than voided,  if
         possible,  so that such is enforceable to the maximum extent  possible,
         and the validity and enforceability of the remaining provisions of this
         debenture will not in any way be affected or impaired thereby.

14.      This  Debenture  and  the  agreements  referred  to in  this  Debenture
         constitute the full and entire  understanding and agreement between the
         Issuer and the Holder with respect  hereof.  Neither this Debenture nor
         any terms hereof may be amended, waived, discharged or terminated other
         than by a written statement signed by the Issuer and the Holder.

15.      This  Debenture  shall be governed by and construed in  accordance  
         with the laws of the state of Delaware and the United State of America.




<PAGE>


IN WITNESS  WHEREOF the Issuer has caused this instrument to be duly executed by
an officer thereunto duly authorized.

ISSUER:
NOISE CANCELLATION
TECHNOLOGIES, INC.



By:   /s/ STEPHEN J. FOGARTY
      Official Signatory of Issuer


Name (Printed:) Stephen J. Fogarty

Title: Senior Vice-President and Chief Financial Officer

Date:  February 7, 1997


<PAGE>


                                    EXHIBIT 1
                              Notice of Conversion
  (To be executed by the Registered Holder in order to Convert the Debenture)

                   TO:     Noise Cancellation Technologies, Inc.
                           1 Dock Street
                           Stamford, Connecticut  06902
                           Attention:  John Horton, General Counsel
                           Fax:     (203) 348-4106
                           Tel:     (203) 961-0500 ext. 388

The  undersigned  (the  "Holder")  hereby  irrevocably  elects to convert  Fifty
Thousand  (USD$50,000.00)  of  the  Debenture  No.  ___  of  NOISE  CANCELLATION
TECHNOLOGIES,  INC. (the "Issuer") according to the conditions set forth in such
Debenture,  as of the date  written  below.  The  shares are to be issued in the
"Street Name" written below:

The undersigned represents and warrants as follows:

(a)      The offer to convert the  Debenture  was made to the Issuer  outside of
         the United States and the undersigned was, at the time the subscription
         form was executed and delivered, and is now outside the United States;

(b)       It is not a U.S.  person  (as such term is defined in Section
          902(a) of Regulation S ("Regulation  S") promulgated  under the United
          States  Securities  Act of  1933  (the  "Securities  Act");  and it is
          converting  the  Debenture for its own account and not for the account
          or benefit of any U.S. person;

(c)      All offers and sales of the Common  Stock shall be made  pursuant to an
         effective  registration  statement under the Securities Act or pursuant
         to  an  exemption  from,  or  in a  transaction  not  subject  to,  the
         registration requirements of the Securities Act;

(d)       It is familiar with and understands the terms and conditions,
          and  requirements  contained in Regulation S and  definitions  of U.S.
          persons contained in Regulation S.

Holder:_____________________(seal)

By:_________________________
   Official Signatory of Holder

Title:_______________________ Country of Execution:____________


<PAGE>


Conversion Date (See Section 4)                      ___________________
Closing Bid on the Closing Date (See Section 4)      ___________________
Average Closing Bid Price (See Section 4)            ___________________
Conversion Price (See Section 4)                     ___________________
Number of common shares to be
received by Holder (see Section 4)                   ___________________
Name of Holder for Registration                      ___________________
Address for Registration                             ___________________
                                                     ___________________
"Street Name" for certificate                        ___________________



<PAGE>


EXHIBIT 4(b)

No.  ___                                                        USD$50,000.00

                      NOISE CANCELLATION TECHNOLOGIES, INC.

                 8% CONVERTIBLE DEBENTURE DUE February 21, 2000

THE DEBENTURE  REPRESENTED BY THIS CERTIFICATE AND THE SECURITIES  ISSUABLE UPON
CONVERSION  HEREOF HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS
AMENDED.  THE  DEBENTURE  HAS BEEN  ACQUIRED  FOR  INVESTMENT  AND NEITHER  THIS
DEBENTURE  NOR THE  SECURITIES  ISSUABLE  UPON  CONVERSION  HEREOF  MAY BE SOLD,
TRANSFERRED  OR ASSIGNED IN THE ABSENCE OF AN EFFECTIVE  REGISTRATION  STATEMENT
FOR THE DEBENTURE OR SUCH  SECURITIES,  AS THE CASE MAY BE, UNDER THE SECURITIES
ACT OF 1933, AS AMENDED,  OR AN OPINION OF COUNSEL IN FORM,  SUBSTANCE AND SCOPE
REASONABLY ACCEPTABLE TO THE ISSUER THAT REGISTRATION IS NOT REQUIRED UNDER SAID
ACT OR  UNLESS  SOLD  PURSUANT  TO RULE 144  UNDER  SAID  ACT.  ANY  SUCH  SALE,
ASSIGNMENT OR TRANSFER MUST ALSO COMPLY WITH APPLICABLE STATE SECURITIES LAW.

THIS  DEBENTURE  is  one of a duly  authorized  issue  of  Debentures  of  NOISE
CANCELLATION TECHNOLOGIES, INC., a corporation duly organized and existing under
the laws of the State of Delaware (the "Issuer") designated as its Eight Percent
(8%) Non-Voting Subordinated Convertible Debentures due FEBRUARY 21, 2000, in an
aggregate  principle  amount  of One  Hundred  Thousand  United  States  Dollars
(USD$100,000.00).

FOR VALUE RECEIVED, the Issuer promises to pay to

                            Sage Capital Investments Limited
                            P.O. Box N-4826
                            Marron House
                            Virginia Street
                            Nassau, Bahamas

the registered holder hereof and its successors and assigns (the "Holder"), the
principle sum of

                                 FIFTY THOUSAND
                      UNITED STATES DOLLARS (USD$50,000.00)

                                       on
                                February 21, 2000
                             (the "Maturity Date"),


<PAGE>



and to pay  interest  on the  principle  sum  outstanding  at the  rate of Eight
Percent (8%) per annum due and payable on March 31st, June 30th,  September 30th
and December 31st of each year until maturity. Interest shall begin to accrue on
the closing date applicable to the issuance of this Debenture as provided in the
"Subscription  Agreement"  defined below (the "Closing  Date").  Payment of each
interest payment may, at the Issuer's option,  be made in cash or by delivery of
the shares of the Issuer's Common Stock ("Common  Stock").  The number of shares
to be  delivered  shall be based on one  hundred  percent  (100%) of the average
closing  bid price of the  Issuer's  Common  Stock as reported on NASDAQ for the
Five (5) Trading  Days  immediately  preceding  the record date for the interest
payment.  The  interest so payable will be paid to the person in whose name this
Debenture is registered on the record of the Issuer  regarding  registration and
transfers of the Debenture (the "Debenture Register");  provided,  however, that
the Issuer's  obligation to a transferee of this  Debenture  arises only if such
transfer,  sale or other  disposition  is made in accordance  with the terms and
conditions of the Offshore Debenture Securities  Subscription Agreement dated as
of  December  13,  1996  between  the Issuer and the Holder  (the  "Subscription
Agreement"). The principle of, and interest of this Debenture (to the extent not
payable by delivery of shares of Issuer's  Common Stock in  accordance  with the
terms  thereof)  are payable in such coin or  currency  of the United  States of
America  as at the time of payment  is legal  tender  for  payment of public and
private debts,  at the address last  appearing on the debenture  Register of the
Issuer as  designated  in writing by the Holder  hereof  from time to time.  The
Issuer will pay the  principal of and accrued and unpaid  interest due upon this
debenture on the Maturity Date, less any amounts  required by law to be deducted
or withheld,  to the Holder at the last address on the Debenture  Register.  The
receipt of such check or shares of Common  Stock shall  constitute  a payment of
principal  and interest  hereunder and shall satisfy and discharge the liability
for  principal  and  interest  on  this  Debenture  to the  extent  of  the  sum
represented  by such  check or  shares  of  Common  Stock  plus any  amounts  so
deducted.

This Debenture is subject to the following additional provisions:

1.       The Debentures are issuable in denominations of Fifty Thousand
         United States Dollars (USD$50,000.00).

2.       The Issuer shall be entitled to withhold from all payments of principle
         of, and interest on, this  Debenture  any amounts  required to withheld
         under the  applicable  provisions  of the United  States  income tax or
         other applicable laws at the time of such payments.

3.        This Debenture has been issued subject to investment and other
          representations  of the  original  Holder  hereof  as set forth in the
          Subscription  Agreement  and may be  transferred  or  exchanged in the
          United States only in compliance  with the  Securities Act of 1933, as
          amended (the "Act") and applicable state securities laws. Prior to the
          due presentment  for such transfer of this  Debenture,  the Issuer and
          any  agent of the  Issuer  may treat  the  person  in whose  name this
          Debenture is duly registered on the Issuer's Debenture Register as the
          owner hereof for the purpose of receiving  payment as provided and all
          other purposes,  whether or not this Debenture be overdue, and neither
          the Issuer nor any agent shall be affected by notice to contrary.

4.        The Holder of this  Debenture is entitled,  at its option,  at
          any time commencing on or after forty-five (45) days after the Closing
          Date to convert the full  unpaid  principle  amount of this  Debenture
          into shares of Common Stock of the Issuer (the "Conversion Shares") at
          a conversion price (the "Conversion  Price") for each Conversion Share
          equal to the lesser of eighty-five percent (85%) of the closing bid of
          the Common Stock on the Closing Date or seventy  percent  (70%) of the
          average  closing bid price of the Common Stock for the five (5) NASDAQ
          Trading Days immediately preceding the Conversion Date (as hereinafter
          defined),  as  reported  by the  National  Association  of  Securities
          Dealers Automated  Quotation  System.  Provided,  however,  that in no
          event  shall the  Conversion  Price ever be less than $0.14 per share.
          The number of Conversion Shares to be received by Holder on conversion
          shall be the product of the unpaid  principal  amount of the Debenture
          being converted  divided by the Conversion  Price. On the Closing Date
          as defined in the Subscription  Agreement,  the Issuer will reserve on
          its books three hundred seventy-five thousand (375,000)
          shares of Common Stock for use in  connection  with  conversion of the
          Debentures.  The Issuer does hereby  irrevocably agree to instruct its
          Transfer  Agent to  provide  Common  Stock  Certificates  representing
          Conversion  Shares  to the  Holder  in  accordance  with the  terms of
          conversion  hereinafter  set out. Holder shall not sell any Conversion
          Shares so converted until forty-five (45) days after the Closing Date.
          Such  conversion  by the  Holder  shall  be  effected  by  the  Holder
          surrendering  to the Issuer this Debenture with the form of Conversion
          Notice  attached  hereto as Exhibit 1,  executed by the Holder of this
          Debenture  and  accompanied,  if  required  by the  Issuer,  by proper
          assignment  hereof in blank delivered in the manner and time period as
          hereinafter set out. The Issuer shall then instruct its Transfer Agent
          to deliver the appropriate Common Stock Certificate to the Holder. For
          purposes of this Debenture,  the "Conversion  Date" shall be deemed to
          be the date on which the Holder has sent by facsimile the executed and
          completed Conversion notice together with a copy of this Debenture and
          any applicable executed assignment to the Issuer. In order to convert,
          this  Debenture  together  with the  Original  Conversion  Notice duly
          executed,  must be delivered by express  courier to the Issuer  within
          Two (2) NASDAQ  Trading Days of the  Conversion  Date.  The Conversion
          Shares must be issued and returned by the Transfer Agent to the Holder
          by  express  courier  with  Five (5)  NASDAQ  Trading  Days  after the
          Conversion  Date.  Accrued but unpaid interest shall, at the option of
          the Issuer,  be subject to conversion  under the terms and  conditions
          concerning  the  payment of  interest  set forth  above at the time of
          conversion  of this  Debenture or at the time any  quarterly  interest
          payments  are  due.  No  fractional   shares  or  scrip   representing
          fractional  shares  will be issued on  conversion,  but the  number of
          shares  issuable  shall be rounded to the  nearest  whole  share.  The
          Issuer may, at its own option,  cause the  automatic  conversion  into
          Conversion  Shares of the full unpaid amount of this  Debenture  after
          February 15, 1998 at the aforesaid  Conversion  Price.  The Issuer may
          exercise  its option to cause the  automatic  conversion  as set forth
          herein after said sixty (60) days notice to Holder  during which sixty
          (60) days Holder may convert in accordance  with  Holder's  conversion
          privileges  hereunder.  After the sixty (60) days and the  exercise of
          said automatic conversion,  Issuer may only exercise further automatic
          conversion(s)  in connection  with not less than  twenty-five  percent
          (25%) of the then remaining  amounts of outstanding  Conversion Shares
          pertaining  to  all  of  the  unconverted   Debentures  per  automatic
          conversion and only after thirty (30) days notice

         to  Holder  during  which  thirty  (30)  days  Holder  may  convert  in
         accordance with Holder's conversion  privileges  hereunder.  The option
         shall  be  effectively  exercised  on the  date  on  which  the  Issuer
         transmits by facsimile transmission and mails notice of said conversion
         to the  registered  Holder of the effected  Debentures.  To effect such
         conversion  by the  Issuer,  the  Conversion  Shares must be issued and
         delivered by the Transfer Agent to the Holder by express  courier on or
         before the fifth  (5th)  NASDAQ  Trading Day after the last day of such
         sixty (60) or thirty (30) day notice period, as the case may be, or the
         date on which the Holder notifies the Issuer that the Holder elects not
         to exercise the Holder's conversion privileges hereunder.  Upon receipt
         of the  Conversion  Shares and the payment (in cash or Common  Stock as
         herein provided) of any unpaid interest,  the Holder shall  immediately
         deliver the Debenture, appropriately marked to indicate payment in full
         thereof,  to the  Issuer  or its  assignee  pursuant  to  Issuer or its
         assignee's instructions.

5.       No provision of this Debenture  shall alter or impair the obligation of
         the Issuer,  which is absolute and unconditional,  to pay the principal
         of, and interest on, this Debenture at the place, time and rate, and in
         the coins or currency, herein prescribed.

6.       The Issuer hereby  expressly waives demand and presentment for payment,
         notice of nonpayment,  protest,  notice of protest, notice of dishonor,
         notice of  acceleration  or intent to accelerate,  bringing of suit and
         diligence in taking any action to collect  amounts called for hereunder
         and shall be directly and primarily  liable for the payment of all sums
         owing and to be owing  hereon,  regardless  of and  without any notice,
         diligence,  act or omission as or with respect to the collection of any
         amount called for hereunder.

7.       The Issuer  agrees to pay all cost and expenses,  including  reasonable
         attorneys'  fees, which may be incurred by the Holder in collecting any
         amount due or exercising the conversion rights under this Debenture.

8.       If one or more of the following described "Events of Default" shall 
         occur:

         (a)      The Issuer  shall  default in the  payment of  principal  or  
                  interest  on this Debenture; or

         (b)      Any of the  representations  or warranties  made by the Issuer
                  herein, in the Subscription  Agreement,  or in any certificate
                  or  financial  or other  statements  heretofore  or  hereafter
                  furnished by or on behalf of the Issuer in connection with the
                  execution and delivery of this  Debenture or the  Subscription
                  Agreement shall be false or misleading in any material respect
                  at the time; or

         (c)      The  Issuer  shall  fail to issue  the  Conversion  Shares  in
                  accordance  with the terms of conversion  set out in Section 4
                  above or to  perform  or  observe  any other  covenant,  term,
                  provision,  condition,  agreement or  obligation of the Issuer
                  under this Debenture and such failure shall  continue  uncured
                  for a period of seven (7) days after notice from the Holder of
                  such failure; or

         (d)      The Issuer  shall (1) become  insolvent;  (2) admit in writing
                  its  inability to pay its debt  generally as they mature;  (3)
                  make an  assignment  for the benefit of  creditors or commence
                  proceedings for its  dissolution;  or (4) apply for or consent
                  to the appointment of a trustee, liquidator or receiver for it
                  or for a substantial part of its property or business; or

         (e)      A trustee,  liquidator or receiver  shall be appointed for the
                  Issuer  or a  substantial  part of its  property  or  business
                  without its consent and shall not be discharged  within thirty
                  (30) days after such appointment; or

         (f)      Any governmental agency or any court of competent jurisdiction
                  at  the  instance  of any  governmental  agency  shall  assume
                  custody or control off the whole or any substantial portion of
                  the  properties  or  assets  of the  Issuer  and  shall not be
                  dismissed within thirty (30) calendar days thereafter; or

         (g)      Bankruptcy,   reorganization,    insolvency   or   liquidation
                  proceedings  or  other   proceedings   for  relief  under  any
                  bankruptcy  law or any law for the relief of debtors  shall be
                  instituted by or against the Issuer, and if instituted against
                  the Issuer, shall not be dismissed within thirty (30) calendar
                  days after such  institution or the Issuer shall by any action
                  or answer  approve of,  consent to, or  acquiesce  in any such
                  proceedings or audit the material  allegations  of, or default
                  in answering a petition filed in such proceeding; or

         (h)      The  Issuer's  Common Stock shall cease to be quoted on any of
                  the  New  York  Stock   Exchange,   American  Stock  Exchange,
                  NASDAQ-National  Market,  NASDAQ-Small  Cap or OTC  Electronic
                  Bulletin  Board for a period in excess of ninety (90) Calendar
                  Days.

         Then,  or at any time  thereafter,  and in each and  every  such  case,
         unless  such Event of Default  shall have been waived in writing by the
         Holder  (which  waiver  shall  not  be  deemed  to be a  waiver  of any
         subsequent  default)  at the option of the  Holder and in the  Holder's
         sole discretion, the Holder may consider this Debenture immediately due
         and  payable,  without  presentment,  demand,  protest or notice of any
         kind, all of which are hereby expressly  waived,  anything herein or in
         any   note   or   other   instruments   contained   to   the   contrary
         notwithstanding, and the Holder may immediately, and without expiration
         of any period of grace,  enforce any and all of the Holder's rights and
         remedies  provided  herein or nay other rights or remedies  afforded by
         law.

9.       No recourse  shall be had for the payment of the  principal  of, or the
         interest  on,  this  Debenture,  or for  any  claim  based  hereon,  or
         otherwise in respect  hereof,  against any  incorporator,  shareholder,
         officer or director, as such, past, present or future, of the Issuer or
         any  successor  corporation,  whether  by virtue  of any  constitution,
         statue or rule of law, or by  enforcement  by any assessment or penalty
         or otherwise,  all such liability  being,  by acceptance  hereof and as
         part of the  consideration  for the issue hereof  expressly  waived and
         released.

10.      The  Holder  of  this  Debenture,  by  execution  of  the  Subscription
         Agreement and  acceptance  hereof  agrees that this  Debenture is being
         acquired for  investment  purposes and that such Holder will not offer,
         sell or  otherwise  dispose of this  debenture  or the shares of Common
         Stock issuable upon conversion thereof except under circumstances which
         shall not result in a violation of the Act or any applicable State Blue
         Sky law or similar laws relating to the sale of securities.

11.       By acceptance of this Debenture,  the Holder hereby grants to
          the Issuer or its assignee  the option  ("Prepayment  Option"),  for a
          period  beginning  after  February 15, 1998 to  repurchase  all of the
          outstanding  portion of the  Debenture  plus accrued  interest,  after
          sixty (60) days notice to Holder  during  which sixty (60) days Holder
          may  convert  in  accordance  with  Holder's   conversion   privileges
          hereunder.  The repurchase  price of this  Debenture (the  "Repurchase
          Price")  shall be equal to One Hundred and Five Percent  (105%) of the
          full unpaid principal  amount of the Debenture,  plus accrued interest
          payable in cash.  This  Prepayment  Option may be exercised by written
          notice via telecopy transmission to the Holder (with written notice to
          the registered  address by overnight  courier) after February 15, 1998
          and delivery of the  Repurchase  Monies to the Holder on or before the
          fifth (5th)  NASDAQ  trading day after the last day of such sixty (60)
          day notice period or the date on which the Holder  notifies the Issuer
          that  the  Holder  elects  not to  exercise  the  Holder's  conversion
          privileges  hereunder.  Upon receipt of the Repurchase Monies,  Holder
          shall  immediately  deliver  the  Debenture,  appropriately  marked to
          indicate  payment  in full  thereof,  to the  Issuer  or its  assignee
          pursuant to Issuer's or its assignee's instructions.

12.      In the case  that  there is any  outstanding  amount  of the  Debenture
         unconverted on February 21, 2000, the outstanding  unconverted  portion
         of the Debenture  will be subject to automatic  conversion  pursuant to
         the provisions of the last four sentences in Section 4 hereunder.

13.      In case any provision of this Debenture is held by a court of competent
         jurisdiction  to  be  excessive  in  scope  or  otherwise   invalid  or
         unenforceable  such provision shall be adjusted rather than voided,  if
         possible,  so that such is enforceable to the maximum extent  possible,
         and the validity and enforceability of the remaining provisions of this
         debenture will not in any way be affected or impaired thereby.

14.      This  Debenture  and  the  agreements  referred  to in  this  Debenture
         constitute the full and entire  understanding and agreement between the
         Issuer and the Holder with respect  hereof.  Neither this Debenture nor
         any terms hereof may be amended, waived, discharged or terminated other
         than by a written statement signed by the Issuer and the Holder.

15.       This  Debenture  shall  be  governed  by  and  construed  in
          accordance with the laws of the state of Delaware and the United 
          States of America.




<PAGE>


IN WITNESS  WHEREOF the Issuer has caused this instrument to be duly executed by
an officer thereunto duly authorized.

ISSUER:
NOISE CANCELLATION
TECHNOLOGIES, INC.



By:   /s/ STEPHEN J. FOGARTY
      Official Signatory of Issuer


Name (Printed:) Stephen J. Fogarty

Title: Senior Vice-President and Chief Financial Officer

Date:  February 21, 1997


<PAGE>


                                    EXHIBIT 1
                              Notice of Conversion
   o be executed by the Registered Holder in order to Convert the Debenture)

                   TO:     Noise Cancellation Technologies, Inc.
                           1 Dock Street
                           Stamford, Connecticut  06902
                           Attention:  John Horton, General Counsel
                           Fax:     (203) 348-4106
                           Tel:     (203) 961-0500 ext. 388

The  undersigned  (the  "Holder")  hereby  irrevocably  elects to convert  Fifty
Thousand  (USD$50,000.00)  of  the  Debenture  No.  ___  of  NOISE  CANCELLATION
TECHNOLOGIES,  INC. (the "Issuer") according to the conditions set forth in such
Debenture,  as of the date  written  below.  The  shares are to be issued in the
"Street Name" written below:

The undersigned represents and warrants as follows:

(a)      The offer to convert the  Debenture  was made to the Issuer  outside of
         the United States and the undersigned was, at the time the subscription
         form was executed and delivered, and is now outside the United States;

(b)       It is not a U.S.  person  (as such term is defined in Section
          902(a) of Regulation S ("Regulation  S") promulgated  under the United
          States  Securities  Act of  1933  (the  "Securities  Act");  and it is
          converting  the  Debenture for its own account and not for the account
          or benefit of any U.S. person;

(c)      All offers and sales of the Common  Stock shall be made  pursuant to an
         effective  registration  statement under the Securities Act or pursuant
         to  an  exemption  from,  or  in a  transaction  not  subject  to,  the
         registration requirements of the Securities Act;

(d)       It is familiar with and understands the terms and conditions,
          and  requirements  contained in Regulation S and  definitions  of U.S.
          persons contained in Regulation S.

Holder:_____________________(seal)

By:    _____________________
     Official Signatory of Holder

Title:_______________________ Country of Execution:____________


<PAGE>


Conversion Date (See Section 4)                      ______________________
Closing Bid on the Closing Date (See Section 4)      ______________________
Average Closing Bid Price (See Section 4)            ______________________
Conversion Price (See Section 4)                     ______________________
Number of common shares to be
received by Holder (see Section 4)                   ______________________
Name of Holder for Registration                      ______________________
Address for Registration                             ______________________
                                                     ______________________
"Street Name" for certificate                        ______________________



<PAGE>


EXHIBIT 4(c)

No.  ___                                                        USD$50,000.00

                      NOISE CANCELLATION TECHNOLOGIES, INC.

                 8% CONVERTIBLE DEBENTURE DUE February 21, 2000

THE DEBENTURE  REPRESENTED BY THIS CERTIFICATE AND THE SECURITIES  ISSUABLE UPON
CONVERSION  HEREOF HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS
AMENDED.  THE  DEBENTURE  HAS BEEN  ACQUIRED  FOR  INVESTMENT  AND NEITHER  THIS
DEBENTURE  NOR THE  SECURITIES  ISSUABLE  UPON  CONVERSION  HEREOF  MAY BE SOLD,
TRANSFERRED  OR ASSIGNED IN THE ABSENCE OF AN EFFECTIVE  REGISTRATION  STATEMENT
FOR THE DEBENTURE OR SUCH  SECURITIES,  AS THE CASE MAY BE, UNDER THE SECURITIES
ACT OF 1933, AS AMENDED,  OR AN OPINION OF COUNSEL IN FORM,  SUBSTANCE AND SCOPE
REASONABLY ACCEPTABLE TO THE ISSUER THAT REGISTRATION IS NOT REQUIRED UNDER SAID
ACT OR  UNLESS  SOLD  PURSUANT  TO RULE 144  UNDER  SAID  ACT.  ANY  SUCH  SALE,
ASSIGNMENT OR TRANSFER MUST ALSO COMPLY WITH APPLICABLE STATE SECURITIES LAW.


THIS  DEBENTURE  is  one of a duly  authorized  issue  of  Debentures  of  NOISE
CANCELLATION TECHNOLOGIES, INC., a corporation duly organized and existing under
the laws of the State of Delaware (the "Issuer") designated as its Eight Percent
(8%) Non-Voting Subordinated Convertible Debentures due FEBRUARY 21, 2000, in an
aggregate  principle  amount of Two Hundred  Twenty-five  Thousand United States
Dollars (USD$225,000.00).

FOR VALUE RECEIVED, the Issuer promises to pay to

                            Optimum Fund
                            P.O. Box 2003
                            Georgetown, Grand Cayman
                            Grand Cayman Islands
                            British Virgin Islands

the registered holder hereof and its successors and assigns (the "Holder"), the 
principle sum of

                                 FIFTY THOUSAND
                      UNITED STATES DOLLARS (USD$50,000.00)

                                       on
                                February 21, 2000
                             (the "Maturity Date"),


<PAGE>



30

and to pay  interest  on the  principle  sum  outstanding  at the  rate of Eight
Percent (8%) per annum due and payable on March 31st, June 30th,  September 30th
and December 31st of each year until maturity. Interest shall begin to accrue on
the closing date applicable to the issuance of this Debenture as provided in the
"Subscription  Agreement"  defined below (the "Closing  Date").  Payment of each
interest payment may, at the Issuer's option,  be made in cash or by delivery of
the shares of the Issuer's Common Stock ("Common  Stock").  The number of shares
to be  delivered  shall be based on one  hundred  percent  (100%) of the average
closing  bid price of the  Issuer's  Common  Stock as reported on NASDAQ for the
Five (5) Trading  Days  immediately  preceding  the record date for the interest
payment.  The  interest so payable will be paid to the person in whose name this
Debenture is registered on the record of the Issuer  regarding  registration and
transfers of the Debenture (the "Debenture Register");  provided,  however, that
the Issuer's  obligation to a transferee of this  Debenture  arises only if such
transfer,  sale or other  disposition  is made in accordance  with the terms and
conditions of the Offshore Debenture Securities  Subscription Agreement dated as
of  December  13,  1996  between  the Issuer and the Holder  (the  "Subscription
Agreement"). The principle of, and interest of this Debenture (to the extent not
payable by delivery of shares of Issuer's  Common Stock in  accordance  with the
terms  thereof)  are payable in such coin or  currency  of the United  States of
America  as at the time of payment  is legal  tender  for  payment of public and
private debts,  at the address last  appearing on the debenture  Register of the
Issuer as  designated  in writing by the Holder  hereof  from time to time.  The
Issuer will pay the  principal of and accrued and unpaid  interest due upon this
debenture on the Maturity Date, less any amounts  required by law to be deducted
or withheld,  to the Holder at the last address on the Debenture  Register.  The
receipt of such check or shares of Common  Stock shall  constitute  a payment of
principal  and interest  hereunder and shall satisfy and discharge the liability
for  principal  and  interest  on  this  Debenture  to the  extent  of  the  sum
represented  by such  check or  shares  of  Common  Stock  plus any  amounts  so
deducted.

This Debenture is subject to the following additional provisions:

1.       The Debentures  are issuable in  denominations  of Fifty Thousand  
         United States Dollars (USD$50,000.00).

2.       The Issuer shall be entitled to withhold from all payments of principle
         of, and interest on, this  Debenture  any amounts  required to withheld
         under the  applicable  provisions  of the United  States  income tax or
         other applicable laws at the time of such payments.

3.        This Debenture has been issued subject to investment and other
          representations  of the  original  Holder  hereof  as set forth in the
          Subscription  Agreement  and may be  transferred  or  exchanged in the
          United States only in compliance  with the  Securities Act of 1933, as
          amended (the "Act") and applicable state securities laws. Prior to the
          due presentment  for such transfer of this  Debenture,  the Issuer and
          any  agent of the  Issuer  may treat  the  person  in whose  name this
          Debenture is duly registered on the Issuer's Debenture Register as the
          owner hereof for the purpose of receiving  payment as provided and all
          other purposes,  whether or not this Debenture be overdue, and neither
          the Issuer nor any agent shall be affected by notice to contrary.

4.        The Holder of this  Debenture is entitled,  at its option,  at
          any time commencing on or after forty-five (45) days after the Closing
          Date to convert the full  unpaid  principle  amount of this  Debenture
          into shares of Common Stock of the Issuer (the "Conversion Shares") at
          a conversion price (the "Conversion  Price") for each Conversion Share
          equal to the lesser of eighty-five percent (85%) of the closing bid of
          the Common Stock on the Closing Date or seventy  percent  (70%) of the
          average  closing bid price of the Common Stock for the five (5) NASDAQ
          Trading Days immediately preceding the Conversion Date (as hereinafter
          defined),  as  reported  by the  National  Association  of  Securities
          Dealers Automated  Quotation  System.  Provided,  however,  that in no
          event  shall the  Conversion  Price ever be less than $0.14 per share.
          The number of Conversion Shares to be received by Holder on conversion
          shall be the product of the unpaid  principal  amount of the Debenture
          being converted  divided by the Conversion  Price. On the Closing Date
          as defined in the Subscription  Agreement,  the Issuer will reserve on
          its books eight  hundred  forty-three  thousand  seven  hundred  fifty
          (843,750) shares of Common Stock for use in connection with conversion
          of the  Debentures.  The  Issuer  does  hereby  irrevocably  agree  to
          instruct  its  Transfer  Agent to provide  Common  Stock  Certificates
          representing  Conversion  Shares to the Holder in accordance  with the
          terms of  conversion  hereinafter  set out.  Holder shall not sell any
          Conversion  Shares so converted  until  forty-five (45) days after the
          Closing Date.  Such  conversion by the Holder shall be effected by the
          Holder  surrendering  to the Issuer  this  Debenture  with the form of
          Conversion Notice attached hereto as Exhibit 1, executed by the Holder
          of this  Debenture  and  accompanied,  if required  by the Issuer,  by
          proper  assignment  hereof in blank  delivered  in the manner and time
          period as  hereinafter  set out.  The Issuer  shall then  instruct its
          Transfer Agent to deliver the appropriate  Common Stock Certificate to
          the Holder.  For purposes of this  Debenture,  the  "Conversion  Date"
          shall  be  deemed  to be the  date on  which  the  Holder  has sent by
          facsimile the executed and completed Conversion notice together with a
          copy of this Debenture and any applicable  executed  assignment to the
          Issuer. In order to convert, this Debenture together with the Original
          Conversion Notice duly executed,  must be delivered by express courier
          to the Issuer  within Two (2) NASDAQ  Trading  Days of the  Conversion
          Date.  The  Conversion  Shares  must be  issued  and  returned  by the
          Transfer  Agent to the Holder by express  courier with Five (5) NASDAQ
          Trading Days after the Conversion  Date.  Accrued but unpaid  interest
          shall, at the option of the Issuer, be subject to conversion under the
          terms and  conditions  concerning  the payment of  interest  set forth
          above at the time of conversion  of this  Debenture or at the time any
          quarterly  interest  payments are due. No  fractional  shares or scrip
          representing  fractional shares will be issued on conversion,  but the
          number of shares issuable shall be rounded to the nearest whole share.
          The Issuer may, at its own option, cause the automatic conversion into
          Conversion  Shares of the full unpaid amount of this  Debenture  after
          February 15, 1998 at the aforesaid  Conversion  Price.  The Issuer may
          exercise  its option to cause the  automatic  conversion  as set forth
          herein after said sixty (60) days notice to Holder  during which sixty
          (60) days Holder may convert in accordance  with  Holder's  conversion
          privileges  hereunder.  After the sixty (60) days and the  exercise of
          said automatic conversion,  Issuer may only exercise further automatic
          conversion(s)  in connection  with not less than  twenty-five  percent
          (25%) of the then remaining  amounts of outstanding  Conversion Shares
          pertaining  to  all  of  the  unconverted   Debentures  per  automatic
          conversion and only after thirty (30) days notice

         to  Holder  during  which  thirty  (30)  days  Holder  may  convert  in
         accordance with Holder's conversion  privileges  hereunder.  The option
         shall  be  effectively  exercised  on the  date  on  which  the  Issuer
         transmits by facsimile transmission and mails notice of said conversion
         to the  registered  Holder of the effected  Debentures.  To effect such
         conversion  by the  Issuer,  the  Conversion  Shares must be issued and
         delivered by the Transfer Agent to the Holder by express  courier on or
         before the fifth  (5th)  NASDAQ  Trading Day after the last day of such
         sixty (60) or thirty (30) day notice period, as the case may be, or the
         date on which the Holder notifies the Issuer that the Holder elects not
         to exercise the Holder's conversion privileges hereunder.  Upon receipt
         of the  Conversion  Shares and the payment (in cash or Common  Stock as
         herein provided) of any unpaid interest,  the Holder shall  immediately
         deliver the Debenture, appropriately marked to indicate payment in full
         thereof,  to the  Issuer  or its  assignee  pursuant  to  Issuer or its
         assignee's instructions.

5.       No provision of this Debenture  shall alter or impair the obligation of
         the Issuer,  which is absolute and unconditional,  to pay the principal
         of, and interest on, this Debenture at the place, time and rate, and in
         the coins or currency, herein prescribed.

6.       The Issuer hereby  expressly waives demand and presentment for payment,
         notice of nonpayment,  protest,  notice of protest, notice of dishonor,
         notice of  acceleration  or intent to accelerate,  bringing of suit and
         diligence in taking any action to collect  amounts called for hereunder
         and shall be directly and primarily  liable for the payment of all sums
         owing and to be owing  hereon,  regardless  of and  without any notice,
         diligence,  act or omission as or with respect to the collection of any
         amount called for hereunder.

7.       The Issuer  agrees to pay all cost and expenses,  including  reasonable
         attorneys'  fees, which may be incurred by the Holder in collecting any
         amount due or exercising the conversion rights under this Debenture.

8.       If one or more of the following described "Events of Default" shall 
         occur:

         (a)      The Issuer  shall  default in the  payment of  principal  or  
                  interest  on this Debenture; or

         (b)      Any of the  representations  or warranties  made by the Issuer
                  herein, in the Subscription  Agreement,  or in any certificate
                  or  financial  or other  statements  heretofore  or  hereafter
                  furnished by or on behalf of the Issuer in connection with the
                  execution and delivery of this  Debenture or the  Subscription
                  Agreement shall be false or misleading in any material respect
                  at the time; or

         (c)      The  Issuer  shall  fail to issue  the  Conversion  Shares  in
                  accordance  with the terms of conversion  set out in Section 4
                  above or to  perform  or  observe  any other  covenant,  term,
                  provision,  condition,  agreement or  obligation of the Issuer
                  under this Debenture and such failure shall  continue  uncured
                  for a period of seven (7) days after notice from the Holder of
                  such failure; or

         (d)      The Issuer  shall (1) become  insolvent;  (2) admit in writing
                  its  inability to pay its debt  generally as they mature;  (3)
                  make an  assignment  for the benefit of  creditors or commence
                  proceedings for its  dissolution;  or (4) apply for or consent
                  to the appointment of a trustee, liquidator or receiver for it
                  or for a substantial part of its property or business; or

         (e)      A trustee,  liquidator or receiver  shall be appointed for the
                  Issuer  or a  substantial  part of its  property  or  business
                  without its consent and shall not be discharged  within thirty
                  (30) days after such appointment; or

         (f)      Any governmental agency or any court of competent jurisdiction
                  at  the  instance  of any  governmental  agency  shall  assume
                  custody or control off the whole or any substantial portion of
                  the  properties  or  assets  of the  Issuer  and  shall not be
                  dismissed within thirty (30) calendar days thereafter; or

         (g)      Bankruptcy,   reorganization,    insolvency   or   liquidation
                  proceedings  or  other   proceedings   for  relief  under  any
                  bankruptcy  law or any law for the relief of debtors  shall be
                  instituted by or against the Issuer, and if instituted against
                  the Issuer, shall not be dismissed within thirty (30) calendar
                  days after such  institution or the Issuer shall by any action
                  or answer  approve of,  consent to, or  acquiesce  in any such
                  proceedings or audit the material  allegations  of, or default
                  in answering a petition filed in such proceeding; or

         (h)      The  Issuer's  Common Stock shall cease to be quoted on any of
                  the  New  York  Stock   Exchange,   American  Stock  Exchange,
                  NASDAQ-National  Market,  NASDAQ-Small  Cap or OTC  Electronic
                  Bulletin  Board for a period in excess of ninety (90) Calendar
                  Days.

         Then,  or at any time  thereafter,  and in each and  every  such  case,
         unless  such Event of Default  shall have been waived in writing by the
         Holder  (which  waiver  shall  not  be  deemed  to be a  waiver  of any
         subsequent  default)  at the option of the  Holder and in the  Holder's
         sole discretion, the Holder may consider this Debenture immediately due
         and  payable,  without  presentment,  demand,  protest or notice of any
         kind, all of which are hereby expressly  waived,  anything herein or in
         any   note   or   other   instruments   contained   to   the   contrary
         notwithstanding, and the Holder may immediately, and without expiration
         of any period of grace,  enforce any and all of the Holder's rights and
         remedies  provided  herein or nay other rights or remedies  afforded by
         law.

9.       No recourse  shall be had for the payment of the  principal  of, or the
         interest  on,  this  Debenture,  or for  any  claim  based  hereon,  or
         otherwise in respect  hereof,  against any  incorporator,  shareholder,
         officer or director, as such, past, present or future, of the Issuer or
         any  successor  corporation,  whether  by virtue  of any  constitution,
         statue or rule of law, or by  enforcement  by any assessment or penalty
         or otherwise,  all such liability  being,  by acceptance  hereof and as
         part of the  consideration  for the issue hereof  expressly  waived and
         released.

10.      The  Holder  of  this  Debenture,  by  execution  of  the  Subscription
         Agreement and  acceptance  hereof  agrees that this  Debenture is being
         acquired for  investment  purposes and that such Holder will not offer,
         sell or  otherwise  dispose of this  debenture  or the shares of Common
         Stock issuable upon conversion thereof except under circumstances which
         shall not result in a violation of the Act or any applicable State Blue
         Sky law or similar laws relating to the sale of securities.

11.       By acceptance of this Debenture,  the Holder hereby grants to
          the Issuer or its assignee  the option  ("Prepayment  Option"),  for a
          period  beginning  after  February 15, 1998 to  repurchase  all of the
          outstanding  portion of the  Debenture  plus accrued  interest,  after
          sixty (60) days notice to Holder  during  which sixty (60) days Holder
          may  convert  in  accordance  with  Holder's   conversion   privileges
          hereunder.  The repurchase  price of this  Debenture (the  "Repurchase
          Price")  shall be equal to One Hundred and Five Percent  (105%) of the
          full unpaid principal  amount of the Debenture,  plus accrued interest
          payable in cash.  This  Prepayment  Option may be exercised by written
          notice via telecopy transmission to the Holder (with written notice to
          the registered  address by overnight  courier) after February 15, 1998
          and delivery of the  Repurchase  Monies to the Holder on or before the
          fifth (5th)  NASDAQ  trading day after the last day of such sixty (60)
          day notice period or the date on which the Holder  notifies the Issuer
          that  the  Holder  elects  not to  exercise  the  Holder's  conversion
          privileges  hereunder.  Upon receipt of the Repurchase Monies,  Holder
          shall  immediately  deliver  the  Debenture,  appropriately  marked to
          indicate  payment  in full  thereof,  to the  Issuer  or its  assignee
          pursuant to Issuer's or its assignee's instructions.

12.      In the case  that  there is any  outstanding  amount  of the  Debenture
         unconverted on February 21, 2000, the outstanding  unconverted  portion
         of the Debenture  will be subject to automatic  conversion  pursuant to
         the provisions of the last four sentences in Section 4 hereunder.

13.      In case any provision of this Debenture is held by a court of competent
         jurisdiction  to  be  excessive  in  scope  or  otherwise   invalid  or
         unenforceable  such provision shall be adjusted rather than voided,  if
         possible,  so that such is enforceable to the maximum extent  possible,
         and the validity and enforceability of the remaining provisions of this
         debenture will not in any way be affected or impaired thereby.

14.      This  Debenture  and  the  agreements  referred  to in  this  Debenture
         constitute the full and entire  understanding and agreement between the
         Issuer and the Holder with respect  hereof.  Neither this Debenture nor
         any terms hereof may be amended, waived, discharged or terminated other
         than by a written statement signed by the Issuer and the Holder.

15.      This  Debenture  shall be governed by and construed in  accordance  
         with the laws of the state of Delaware and the United States of 
         America.




<PAGE>


IN WITNESS  WHEREOF the Issuer has caused this instrument to be duly executed by
an officer thereunto duly authorized.

ISSUER:
NOISE CANCELLATION
TECHNOLOGIES, INC.



By:   /s/ STEPHEN J. FOGARTY
      Official Signatory of Issuer


Name (Printed:) Stephen J. Fogarty
Title: Senior Vice-President and Chief Financial Officer

Date:  February 21, 1997


<PAGE>


                                    EXHIBIT 1
                              Notice of Conversion
  (To be executed by the Registered Holder in order to Convert the Debenture)

                   TO:     Noise Cancellation Technologies, Inc.
                           1 Dock Street
                           Stamford, Connecticut  06902
                           Attention:  John Horton, General Counsel
                           Fax:     (203) 348-4106
                           Tel:     (203) 961-0500 ext. 388

     The undersigned (the "Holder") hereby  irrevocably  elects to convert Fifty
     Thousand (USD  $50,000.00)  of the Debenture No. ___ of NOISE  CANCELLATION
     TECHNOLOGIES,  INC. (the "Issuer") according to the conditions set forth in
     such Debenture,  as of the date written below.  The shares are to be issued
     in the "Street Name" written below:

The undersigned represents and warrants as follows:

(a)      The offer to convert the  Debenture  was made to the Issuer  outside of
         the United States and the undersigned was, at the time the subscription
         form was executed and delivered, and is now outside the United States;

(b)       It is not a U.S.  person  (as such term is defined in Section
          902(a) of Regulation S ("Regulation  S") promulgated  under the United
          States  Securities  Act of  1933  (the  "Securities  Act");  and it is
          converting  the  Debenture for its own account and not for the account
          or benefit of any U.S. person;

(c)      All offers and sales of the Common  Stock shall be made  pursuant to an
         effective  registration  statement under the Securities Act or pursuant
         to  an  exemption  from,  or  in a  transaction  not  subject  to,  the
         registration requirements of the Securities Act;

(d)       It is familiar with and understands the terms and conditions,
          and  requirements  contained in Regulation S and  definitions  of U.S.
          persons contained in Regulation S.

Holder:__________________________(seal)

By:    __________________________
       Official Signatory of Holder

Title:____________________________ Country of Execution:____________


<PAGE>


Conversion Date (See Section 4)                      ____________________
Closing Bid on the Closing Date (See Section 4)      ____________________
Average Closing Bid Price (See Section 4)            ____________________
Conversion Price (See Section 4)                     ____________________
Number of common shares to be
received by Holder (see Section 4)                   ____________________
Name of Holder for Registration                      ____________________
Address for Registration                             ____________________
                                                     ____________________
"Street Name" for certificate                        ____________________




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