<PAGE>
                                                                     EXHIBIT 4.3

                                                                       EXHIBIT A

NEITHER THESE SECURITIES NOR THE SECURITIES INTO WHICH THESE SECURITIES ARE
EXERCISABLE HAVE BEEN REGISTERED WITH THE SECURITIES AND EXCHANGE COMMISSION OR
THE SECURITIES COMMISSION OF ANY STATE IN RELIANCE UPON AN EXEMPTION FROM
REGISTRATION UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES
ACT"), AND, ACCORDINGLY, MAY NOT BE OFFERED OR SOLD EXCEPT PURSUANT TO AN
EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT OR PURSUANT TO AN
AVAILABLE EXEMPTION FROM, OR IN A TRANSACTION NOT SUBJECT TO, THE REGISTRATION
REQUIREMENTS OF THE SECURITIES ACT AND IN ACCORDANCE WITH APPLICABLE STATE
SECURITIES LAWS AS EVIDENCED BY A LEGAL OPINION OF COUNSEL TO THE TRANSFEROR TO
SUCH EFFECT, THE SUBSTANCE OF WHICH SHALL BE REASONABLY ACCEPTABLE TO THE
COMPANY. THESE SECURITIES AND THE SECURITIES ISSUABLE UPON EXERCISE OF THESE
SECURITIES MAY BE PLEDGED IN CONNECTION WITH A BONA FIDE MARGIN ACCOUNT.

                         AMERICAN TECHNOLOGY CORPORATION

                                     WARRANT

Warrant No. [  ]                        Date of Original Issuance: July 11, 2003

     American Technology Corporation, a Delaware corporation (the "Company"),
hereby certifies that, for value received, [ ] or its registered assigns (the
"Holder"), is entitled to purchase from the Company up to a total of [ ]/1/
shares of common stock, par value $.00001 per share (the "Common Stock"), of the
Company (each such share, a "Warrant Share" and all such shares, the "Warrant
Shares") at an exercise price equal to $6.75 per share (as adjusted from time to
time as provided in Section 9, the "Exercise Price"), at any time and from time
to time from and after the date hereof and through and including July 10, 2007
(the "Expiration Date"), and subject to the following terms and conditions:

     1. Definitions. In addition to the terms defined elsewhere in this Warrant,
        -----------
capitalized terms that are not otherwise defined herein shall have the meanings
given to such terms in the Securities Purchase Agreement of even date herewith
to which the Company and the original Holder are parties (the "Purchase
Agreement").

     2. Registration of Warrant. The Company shall register this Warrant, upon
        -----------------------
records to be maintained by the Company for that purpose (the "Warrant
Register"), in the name of the record Holder hereof from time to time. The
Company may deem and treat the registered Holder

--------
1   The number of shares of Common Stock equal to 25% of the quotient obtained
    by dividing the Investment Amount of such Purchaser by the Per Unit Purchase
    Price.

<PAGE>

of this Warrant as the absolute owner hereof for the purpose of any exercise
hereof or any distribution to the Holder, and for all other purposes, absent
actual notice to the contrary.

     3. Registration of Transfers. The Company shall register the transfer of
        -------------------------
any portion of this Warrant in the Warrant Register, upon surrender of this
Warrant, with the Form of Assignment attached hereto duly completed and signed,
to the Company at its address specified herein. Upon any such registration or
transfer, a new Warrant to purchase Common Stock, in substantially the form of
this Warrant (any such new Warrant, a "New Warrant"), evidencing the portion of
this Warrant so transferred shall be issued to the transferee and a New Warrant
evidencing the remaining portion of this Warrant not so transferred, if any,
shall be issued to the transferring Holder. The acceptance of the New Warrant by
the transferee thereof shall be deemed the acceptance by such transferee of all
of the rights and obligations of a holder of a Warrant.

     4. Exercise and Duration of Warrants. This Warrant shall be exercisable by
        ---------------------------------
the registered Holder at any time and from time to time on or after the date
hereof to and including the Expiration Date, but not for less than 2,500 Warrant
Shares at a time (or such lesser number of Warrant Shares that may then
constitute the maximum number purchasable; such number being subject to
adjustment as provided in Section 9 below). At 6:30 p.m., New York City time on
the Expiration Date, the portion of this Warrant not exercised prior thereto
shall be and become void and of no value. The Company may not call or redeem all
or any portion of this Warrant without the prior written consent of the Holder.

     5. Delivery of Warrant Shares.
        --------------------------

        (a) To effect conversions hereunder, the Holder shall not be required to
physically surrender this Warrant unless the aggregate Warrant Shares
represented by this Warrant is being exercised. Upon delivery of the Exercise
Notice to the Company (with the attached Warrant Shares Exercise Log) at its
address for notice set forth herein and upon payment of the Exercise Price
multiplied by the number of Warrant Shares that the Holder intends to purchase
hereunder, the Company shall promptly (but in no event later than three Trading
Days after the Date of Exercise (as defined herein)) issue and deliver to the
Holder, a certificate for the Warrant Shares issuable upon such exercise, which
shall be free of restrictive legends in the circumstances specified in the
Purchase Agreement. The Company shall, upon request of the Holder and subsequent
to the date on which a registration statement covering the resale of the Warrant
Shares has been declared effective by the Securities and Exchange Commission,
use its best efforts to deliver Warrant Shares hereunder electronically through
the Depository Trust Corporation or another established clearing corporation
performing similar functions, if available, provided, that, the Company may, but
will not be required to change its transfer agent if its current transfer agent
cannot deliver Warrant Shares electronically through the Depository Trust
Corporation. A "Date of Exercise" means the date on which the Holder shall have
delivered to Company: (i) the Exercise Notice (with the Warrant Exercise Log
attached to it), appropriately completed and duly signed and (ii) if such Holder
is not utilizing the cashless exercise provisions set forth in this Warrant,
payment of the Exercise Price for the number of Warrant Shares so indicated by
the Holder to be purchased.

                                       -2-

<PAGE>

        (b) If by the third Trading Day after a Date of Exercise the Company
fails to deliver the required number of Warrant Shares in the manner required
pursuant to Section 5(a), then the Holder will have the right to rescind such
exercise.

        (c) If by the third Trading Day after a Date of Exercise the Company
fails to deliver the required number of Warrant Shares in the manner required
pursuant to Section 5(a), and if after such third Trading Day and prior to the
receipt of such Warrant Shares, the Holder purchases (in an open market
transaction or otherwise) shares of Common Stock to deliver in satisfaction of a
sale by the Holder of the Warrant Shares which the Holder anticipated receiving
upon such exercise (a "Buy-In"), then the Company shall (1) pay in cash to the
Holder the amount by which (x) the Holder's total purchase price (including
brokerage commissions, if any) for the shares of Common Stock so purchased
exceeds (y) the amount obtained by multiplying (A) the number of Warrant Shares
that the Company was required to deliver to the Holder in connection with the
exercise at issue by (B) the closing bid price of the Common Stock at the time
of the obligation giving rise to such purchase obligation and (2) at the option
of the Holder, either reinstate the portion of the Warrant and equivalent number
of Warrant Shares for which such exercise was not honored or deliver to the
Holder the number of shares of Common Stock that would have been issued had the
Company timely complied with its exercise and delivery obligations hereunder.
The Holder shall provide the Company written notice indicating the amounts
payable to the Holder in respect of the Buy-In.

        (d) The Company's obligations to issue and deliver Warrant Shares in
accordance with the terms hereof are absolute and unconditional, irrespective of
any action or inaction by the Holder to enforce the same, any waiver or consent
with respect to any provision hereof, the recovery of any judgment against any
Person or any action to enforce the same, or any setoff, counterclaim,
recoupment, limitation or termination, or any breach or alleged breach by the
Holder or any other Person of any obligation to the Company or any violation or
alleged violation of law by the Holder or any other Person, and irrespective of
any other circumstance which might otherwise limit such obligation of the
Company to the Holder in connection with the issuance of Warrant Shares. Nothing
herein shall limit a Holder's right to pursue any other remedies available to it
hereunder, at law or in equity including, without limitation, a decree of
specific performance and/or injunctive relief with respect to the Company's
failure to timely deliver certificates representing shares of Common Stock upon
exercise of the Warrant as required pursuant to the terms hereof.

     6. Charges, Taxes and Expenses. Issuance and delivery of certificates for
        ---------------------------
shares of Common Stock upon exercise of this Warrant shall be made without
charge to the Holder for any issue or transfer tax, withholding tax, transfer
agent fee or other incidental tax or expense in respect of the issuance of such
certificates, all of which taxes and expenses shall be paid by the Company;
provided, however, that the Company shall not be required to pay any tax which
may be payable in respect of any transfer involved in the registration of any
certificates for Warrant Shares or Warrants in a name other than that of the
Holder. The Holder shall be responsible for all other tax liability that may
arise as a result of holding or transferring this Warrant or receiving Warrant
Shares upon exercise hereof.

     7. Replacement of Warrant. If this Warrant is mutilated, lost, stolen or
        ----------------------
destroyed, the Company shall issue or cause to be issued in exchange and
substitution for and upon

                                       -3-

<PAGE>

cancellation hereof, or in lieu of and substitution for this Warrant, a New
Warrant, but only upon receipt of evidence reasonably satisfactory to the
Company of such loss, theft or destruction and customary and reasonable
indemnity (which shall not include a surety bond), if requested. Applicants for
a New Warrant under such circumstances shall also comply with such other
reasonable regulations and procedures and pay such other reasonable third-party
costs as the Company may prescribe. If a New Warrant is requested as a result of
a mutilation of this Warrant, then the Holder shall deliver such mutilated
Warrant to the Company as a condition precedent to the Company's obligation to
issue the New Warrant.

     8. Reservation of Warrant Shares. The Company covenants that it will at all
        -----------------------------
times reserve and keep available out of the aggregate of its authorized but
unissued and otherwise unreserved Common Stock, solely for the purpose of
enabling it to issue Warrant Shares upon exercise of this Warrant as herein
provided, the number of Warrant Shares which are then issuable and deliverable
upon the exercise of this entire Warrant, free from preemptive rights or any
other contingent purchase rights of persons other than the Holder (taking into
account the adjustments and restrictions of Section 9). The Company covenants
                                            ---------
that all Warrant Shares so issuable and deliverable shall, upon issuance and the
payment of the applicable Exercise Price in accordance with the terms hereof, be
duly and validly authorized, issued and fully paid and nonassessable.

     9. Certain Adjustments. The Exercise Price and number of Warrant Shares
        -------------------
issuable upon exercise of this Warrant are subject to adjustment from time to
time as set forth in this Section 9.
                          ---------

        (a) Stock Dividends and Splits. If the Company, at any time while this
            --------------------------
Warrant is outstanding, (i) pays a stock dividend on its Common Stock or
otherwise makes a distribution on any class of capital stock that is payable in
shares of Common Stock, (ii) subdivides outstanding shares of Common Stock into
a larger number of shares, or (iii) combines outstanding shares of Common Stock
into a smaller number of shares, then in each such case the Exercise Price shall
be multiplied by a fraction of which the numerator shall be the number of shares
of Common Stock outstanding immediately before such event and of which the
denominator shall be the number of shares of Common Stock outstanding
immediately after such event. Any adjustment made pursuant to clause (i) of this
paragraph shall become effective immediately after the record date for the
determination of stockholders entitled to receive such dividend or distribution,
and any adjustment pursuant to clause (ii) or (iii) of this paragraph shall
become effective immediately after the effective date of such subdivision or
combination. If any event requiring an adjustment under this paragraph occurs
during the period that an Exercise Price is calculated hereunder, then the
calculation of such Exercise Price shall be adjusted appropriately to reflect
such event.

     (b) Pro Rata Distributions. If the Company, at any time while this Warrant
         ----------------------
is outstanding, distributes to all holders of Common Stock (i) evidences of its
indebtedness, (ii) any security (other than a distribution of Common Stock
covered by the preceding paragraph), (iii) rights or warrants to subscribe for
or purchase any security, or (iv) any other asset (in each case, "Distributed
Property"), then upon any exercise of the Warrant that occurs after the record
date for such distribution, such Holder shall be entitled to receive, in
addition to the Warrant Shares otherwise issuable upon such conversion, the
Distributed Property that such

                                       -4-

<PAGE>

Holder would have been entitled to receive in respect of such number of Warrant
Shares had the Holder been the record holder of such Warrant Shares immediately
prior to such record date, but not before the time such Holder would have
received the Distributed Property if it held the Warrant Shares on such record
date.

     (c) Fundamental Transactions. If, at any time while this Warrant is
         ------------------------
outstanding, (1) the Company effects any merger or consolidation of the Company
with or into another Person, (2) the Company effects any sale of all or
substantially all of its assets in one or a series of related transactions, (3)
any tender offer or exchange offer (whether by the Company or another Person) is
completed pursuant to which holders of Common Stock are permitted to tender or
exchange their shares for other securities, cash or property, or (4) the Company
effects any reclassification of the Common Stock or any compulsory share
exchange pursuant to which the Common Stock is effectively converted into or
exchanged for other securities, cash or property (in any such case, a
"Fundamental Transaction"), then the Holder shall have the right thereafter to
receive, upon exercise of this Warrant, the same amount and kind of securities,
cash or property as it would have been entitled to receive upon the occurrence
of such Fundamental Transaction if it had been, immediately prior to such
Fundamental Transaction, the holder of the number of Warrant Shares then
issuable upon exercise in full of this Warrant (the "Alternate Consideration").
For purposes of any such exercise, the determination of the Exercise Price shall
be appropriately adjusted to apply to such Alternate Consideration based on the
amount of Alternate Consideration issuable in respect of one share of Common
Stock in such Fundamental Transaction, and the Company shall apportion the
Exercise Price among the Alternate Consideration in a reasonable manner
reflecting the relative value of any different components of the Alternate
Consideration. If holders of Common Stock are given any choice as to the
securities, cash or property to be received in a Fundamental Transaction, then
the Holder shall be given the same choice as to the Alternate Consideration it
receives upon any exercise of this Warrant following such Fundamental
Transaction. At the Holder's option and request, any successor to the Company or
surviving entity in such Fundamental Transaction shall issue to the Holder a new
warrant substantially in the form of this Warrant and consistent with the
foregoing provisions and evidencing the Holder's right to purchase the Alternate
Consideration for the aggregate Exercise Price upon exercise thereof. The terms
of any agreement pursuant to which a Fundamental Transaction is effected shall
include terms requiring any such successor or surviving entity to comply with
the provisions of this paragraph (c) and insuring that the Warrant (or any such
replacement security) will be similarly adjusted upon any subsequent transaction
analogous to a Fundamental Transaction.

     (d) Future Issuances.
         ----------------

     (1) If the Company or any subsidiary thereof, as applicable with respect to
Common Stock Equivalents (as defined below), at any time while this Warrant is
outstanding, shall issue shares of Common Stock or rights, warrants, options or
other securities or debt that are convertible into or exchangeable for shares of
Common Stock ("Common Stock Equivalents"), entitling any Person to acquire
shares of Common Stock at a price per share less than the Exercise Price
(subject to equitable adjustment for stock splits, recombinations and similar
transactions) (if the holder of the Common Stock or Common Stock Equivalent so
issued shall at any time, whether by operation of purchase price adjustments,
reset provisions, floating conversion, exercise or exchange prices or otherwise,
or due to warrants, options or rights issued

                                       -5-

<PAGE>

in connection with such issuance, be entitled to receive shares of Common Stock
at a price less than the Exercise Price, such issuance shall be deemed to have
occurred for less than the Exercise Price), then, at the option of the Holder,
the Exercise Price shall be multiplied by a fraction, the numerator of which
shall be the number of shares of Common Stock outstanding immediately prior to
the issuance of such shares of Common Stock or such Common Stock Equivalents
plus the number of shares of Common Stock which the offering price for such
shares of Common Stock or Common Stock Equivalents would purchase at the
Exercise Price, and the denominator of which shall be the sum of the number of
shares of Common Stock outstanding immediately prior to such issuance plus the
number of shares of Common Stock so issued or issuable. For purposes hereof, all
shares of Common Stock that are issuable upon conversion, exercise or exchange
of Common Stock Equivalents shall be deemed outstanding immediately after the
issuance of such Common Stock Equivalents. Such adjustment shall be made
whenever such shares of Common Stock or Common Stock Equivalents are issued. The
Company shall notify the Holder in writing, no later than the Trading Day
following the issuance of any Common Stock or Common Stock Equivalent subject to
this section, indicating therein the applicable issuance price, or of applicable
reset price, exchange price, conversion price and other pricing terms.

     (2) The adjustment of the Exercise Price described in Section 9(d)(1) above
shall not apply to: (i) the issuance of securities upon the exercise or
conversion of any Common Stock Equivalents issued by the Company prior to the
date of this Agreement (or to any amendments or modifications thereof other than
such modifications or amendments which have the effect of lowering the exercise,
conversion or purchase price thereof), (ii) the grant of options or warrants, or
the issuance of additional securities, under any duly authorized Company stock
option, restricted stock plan or stock purchase plan, including any inducement
grant to a new executive officer or director, or (iii) the issuance of Common
Stock or Common Stock Equivalents pursuant to a Strategic Transaction (as
defined in the Purchase Agreement).

     (e) Number of Warrant Shares. Simultaneously with any adjustment to the
         ------------------------
Exercise Price pursuant to paragraph (a) of this Section, the number of Warrant
Shares that may be purchased upon exercise of this Warrant shall be increased or
decreased proportionately, so that after such adjustment the aggregate Exercise
Price payable hereunder for the adjusted number of Warrant Shares shall be the
same as the aggregate Exercise Price in effect immediately prior to such
adjustment.

     (f) Calculations. All calculations under this Section 9 shall be made to
         ------------                              ---------
the nearest cent or the nearest 1/100th of a share, as applicable. The number of
shares of Common Stock outstanding at any given time shall not include shares
owned or held by or for the account of the Company, and the disposition of any
such shares shall be considered an issue or sale of Common Stock.

     (g) Notice of Adjustments. Upon the occurrence of each adjustment pursuant
         ---------------------
to this Section 9, the Company at its expense will promptly compute such
        ---------
adjustment in accordance with the terms of this Warrant and prepare a
certificate setting forth such adjustment, including a statement of the adjusted
Exercise Price and adjusted number or type of Warrant Shares or other securities
issuable upon exercise of this Warrant (as applicable), describing the
transactions giving rise to such adjustments and showing in detail the facts
upon which such

                                       -6-

<PAGE>

adjustment is based. Upon written request, the Company will promptly deliver a
copy of each such certificate to the Holder and to the Company's Transfer Agent.

        (h) Notice of Corporate Events. If the Company (i) declares a dividend
            --------------------------
or any other distribution of cash, securities or other property in respect of
its Common Stock, including without limitation any granting of rights or
warrants to subscribe for or purchase any capital stock of the Company or any
Subsidiary, (ii) authorizes or approves, enters into any agreement contemplating
or solicits stockholder approval for any Fundamental Transaction or (iii)
authorizes the voluntary dissolution, liquidation or winding up of the affairs
of the Company, then the Company shall deliver to the Holder a notice describing
the material terms and conditions of such transaction, at least 20 calendar days
prior to the applicable record or effective date on which a Person would need to
hold Common Stock in order to participate in or vote with respect to such
transaction, and the Company will take all steps reasonably necessary in order
to insure that the Holder is given the practical opportunity to exercise this
Warrant prior to such time so as to participate in or vote with respect to such
transaction; provided, however, that the failure to deliver such notice or any
defect therein shall not affect the validity of the corporate action required to
be described in such notice.

     10. Payment of Exercise Price. The Holder may pay the Exercise Price in one
         -------------------------
of the following manners:

         (a) Cash Exercise. The Holder may deliver immediately available funds;
             -------------
or

         (b) Cashless Exercise. If an Exercise Notice is delivered after the
             -----------------
Effectiveness Date (as defined in the Registration Rights Agreement among the
original Holder and the Company in connection with this Warrant) and a
registration statement permitting the Holder to resell the Warrant Shares is not
then effective or the prospectus forming a part thereof is not then available to
the Holder for the resale of the Warrant Shares, then the Holder may notify the
Company in an Exercise Notice of its election to utilize cashless exercise, in
which event the Company shall issue to the Holder the number of Warrant Shares
determined as follows:

                               X = Y [(A-B)/A]

                        where:

                               X = the number of Warrant Shares to be issued to
                                   the Holder.

                               Y = the number of Warrant Shares with respect to
                               which this Warrant is being exercised.

                               A = the average of the closing prices for the
                               five Trading Days immediately prior to (but not
                               including) the Exercise Date.

                               B = the Exercise Price.

For purposes of Rule 144 promulgated under the Securities Act, it is intended,
understood and acknowledged that the Warrant Shares issued in a cashless
exercise transaction shall be deemed

                                       -7-

<PAGE>


to have been acquired by the Holder, and the holding period for the Warrant
Shares shall be deemed to have commenced, on the date this Warrant was
originally issued.

     11. Limitation on Exercise. (a) Notwithstanding anything to the contrary
         ----------------------
contained herein, the number of shares of Common Stock that may be acquired by
the Holder upon any exercise of this Warrant (or otherwise in respect hereof)
shall be limited to the extent necessary to insure that, following such exercise
(or other issuance), the total number of shares of Common Stock then
beneficially owned by such Holder and its Affiliates and any other Persons whose
beneficial ownership of Common Stock would be aggregated with the Holder's for
purposes of Section 13(d) of the Exchange Act, does not exceed 4.999% of the
total number of issued and outstanding shares of Common Stock (including for
such purpose the shares of Common Stock issuable upon such exercise). For such
purposes, beneficial ownership shall be determined in accordance with Section
13(d) of the Exchange Act and the rules and regulations promulgated thereunder.
Each delivery of an Exercise Notice hereunder will constitute a representation
by the Holder that it has evaluated the limitation set forth in this paragraph
and determined that issuance of the full number of Warrant Shares requested in
such Exercise Notice is permitted under this paragraph. This provision shall not
restrict the number of shares of Common Stock which a Holder may receive or
beneficially own in order to determine the amount of securities or other
consideration that such Holder may receive in the event of a merger or other
business combination or reclassification involving the Company as contemplated
in Section 9 of this Warrant. This restriction may not be waived.

         (b) If the Company has not obtained the Shareholder Approval (as
defined below), then the Company may not issue in excess of 1,550,655 shares of
Common Stock upon exercise of the Warrants (as defined in the Purchase
Agreement) at an exercise price below the closing sale price of the Common Stock
on the Trading Day immediately preceding the original date of this Warrant (such
number of shares of Common Stock, the "Issuable Maximum"). Each holder of
Warrants shall be entitled to a portion of the Issuable Maximum equal to the
quotient obtained by dividing: (x) the purchase price paid by it pursuant to the
Purchase Agreement by (y) the purchase price paid by all holders pursuant to the
Purchase Agreement. If a holder of Warrants shall no longer hold its Warrant due
to exercise or cancellation of its Warrant, then such holder's remaining portion
of the Issuable Maximum shall be allocated pro-rata among the remaining holders
of the Warrants. If on any Date of Exercise: (A) the aggregate number of shares
of Common Stock that would then be issuable upon exercise in full of this
Warrant would exceed the Issuable Maximum, and (B) the Company shall not have
previously obtained the vote of shareholders (the "Shareholder Approval"), if
any, as may be required by the applicable rules and regulations of the Nasdaq
National Market (or any successor entity) applicable to approve the issuance of
shares of Common Stock in excess of the Issuable Maximum pursuant to the terms
hereof, then the Company shall issue to the Holder a number of shares of Common
Stock equal to the Issuable Maximum and, with respect to the remainder of the
Warrant Shares then issuable under the Warrant for which an exercise in
accordance with the applicable exercise price would result in an issuance of
shares of Common Stock in excess of the Issuable Maximum (the "Excess Warrant
Shares"), the Holder shall have the option to require the Company to use its
best efforts to obtain the Shareholder Approval applicable to such issuance as
soon as is possible, but in any event not later than the 90th day after such
request. The Company and the Holder understand and agree that shares of Common
Stock issued to and then held by the Holder as a result of exercise of this
Warrant shall not be entitled to cast votes on any resolution to obtain

                                       -8-

<PAGE>

Shareholder Approval pursuant hereto. If the Company shall succeed in obtaining
the Shareholder Approval, the Excess Warrant Shares shall again become fully
exercisable by the Holder.

     12. No Fractional Shares. No fractional shares of Warrant Shares will be
         --------------------
issued in connection with any exercise of this Warrant. In lieu of any
fractional shares which would, otherwise be issuable, the Company shall pay cash
equal to the product of such fraction multiplied by the closing price of one
Warrant Share as reported on the Nasdaq National Market on the date of exercise.

     13. Notices. Any and all notices or other communications or deliveries
         -------
hereunder (including, without limitation, any Exercise Notice) shall be in
writing and shall be deemed given and effective on the earliest of (i) the date
of transmission, if such notice or communication is delivered via facsimile at
the facsimile number specified in this Section prior to 6:30 p.m. (New York City
time) on a Trading Day, (ii) the next Trading Day after the date of
transmission, if such notice or communication is delivered via facsimile at the
facsimile number specified in this Section on a day that is not a Trading Day or
later than 6:30 p.m. (New York City time) on any Trading Day, (iii) the Trading
Day following the date of mailing, if sent by nationally recognized overnight
courier service, or (iv) upon actual receipt by the party to whom such notice is
required to be given. The addresses for such communications shall be: (i) if to
the Company, to American Technology Corporation, 1311 Evening Creek Drive South,
San Diego, CA 92128, Attn: Chief Financial Officer, Facsimile No.: 858-486-3922,
or (ii) if to the Holder, to the address or facsimile number appearing on the
Warrant Register or such other address or facsimile number as the Holder may
provide to the Company in accordance with this Section.

     14. Warrant Agent. The Company shall serve as warrant agent under this
         -------------
Warrant. Upon 30 days' notice to the Holder, the Company may appoint a new
warrant agent. Any corporation into which the Company or any new warrant agent
may be merged or any corporation resulting from any consolidation to which the
Company or any new warrant agent shall be a party or any corporation to which
the Company or any new warrant agent transfers substantially all of its
corporate trust or shareholders services business shall be a successor warrant
agent under this Warrant without any further act. Any such successor warrant
agent shall promptly cause notice of its succession as warrant agent to be
mailed (by first class mail, postage prepaid) to the Holder at the Holder's last
address as shown on the Warrant Register.

     15. Miscellaneous.
         -------------

         (a) This Warrant shall be binding on and inure to the benefit of the
parties hereto and their respective successors and assigns. Subject to the
preceding sentence, nothing in this Warrant shall be construed to give to any
Person other than the Company and the Holder any legal or equitable right,
remedy or cause of action under this Warrant. This Warrant may be amended only
in writing signed by the Company and holder or holders of Warrants representing
no less than 66?% in interest of the Warrant Shares then issuable upon exercise
of all of the Warrants issued pursuant to the Purchase Agreement, and any
amendment so effected shall be binding upon each holder of such Warrants,
provided, that (y) any such amendment or waiver must apply to all Warrants; and
--------
(z) the number of Warrant Shares subject to this Warrant, the Exercise Price
(except for adjustments pursuant to Section 9(d)) and the expiration date of
this

                                       -9-

<PAGE>

Warrant may not be amended, and the right to exercise this Warrant (including,
without limitation, the provisions of Section 10 of this Warrant) may not be
altered or waived, without the written consent of the Holder.

        (b) All questions concerning the construction, validity, enforcement and
interpretation of this Warrant shall be governed by and construed and enforced
in accordance with the internal laws of the State of New York, without regard to
the principles of conflicts of law thereof. Each party agrees that all legal
proceedings concerning the interpretations, enforcement and defense of this
Warrant and the transactions herein contemplated ("Proceedings") (whether
brought against a party hereto or its respective Affiliates, employees or
agents) shall be commenced exclusively in the state and federal courts sitting
in the City of New York, Borough of Manhattan (the "New York Courts"). Each
party hereto hereby irrevocably submits to the exclusive jurisdiction of the New
York Courts for the adjudication of any dispute hereunder or in connection
herewith or with any transaction contemplated hereby or discussed herein, and
hereby irrevocably waives, and agrees not to assert in any Proceeding, any claim
that it is not personally subject to the jurisdiction of any New York Court, or
that such Proceeding has been commenced in an improper or inconvenient forum.
Each party hereto hereby irrevocably waives personal service of process and
consents to process being served in any such Proceeding by mailing a copy
thereof via registered or certified mail or overnight delivery (with evidence of
delivery) to such party at the address in effect for notices to it under this
Warrant and agrees that such service shall constitute good and sufficient
service of process and notice thereof. Nothing contained herein shall be deemed
to limit in any way any right to serve process in any manner permitted by law.
Each party hereto hereby irrevocably waives, to the fullest extent permitted by
applicable law, any and all right to trial by jury in any legal proceeding
arising out of or relating to this Warrant or the transactions contemplated
hereby. If either party shall commence a Proceeding to enforce any provisions of
this Warrant, then the prevailing party in such Proceeding shall be reimbursed
by the other party for its attorney's fees and other costs and expenses incurred
with the investigation, preparation and prosecution of such Proceeding.

        (c) The headings herein are for convenience only, do not constitute a
part of this Warrant and shall not be deemed to limit or affect any of the
provisions hereof.

        (d) In case any one or more of the provisions of this Warrant shall be
invalid or unenforceable in any respect, the validity and enforceability of the
remaining terms and provisions of this Warrant shall not in any way be affected
or impaired thereby and the parties will attempt in good faith to agree upon a
valid and enforceable provision which shall be a commercially reasonable
substitute therefor, and upon so agreeing, shall incorporate such substitute
provision in this Warrant.

                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK,
                             SIGNATURE PAGE FOLLOWS]


                                      -10-

<PAGE>


         IN WITNESS WHEREOF, the Company has caused this Warrant to be duly
executed by its authorized officer as of the date first indicated above.

                                     AMERICAN TECHNOLOGY CORPORATION

                                     By:
                                        ----------------------------------------
                                     Name:
                                     Title:



                                      -11-

<PAGE>

                                 EXERCISE NOTICE

To American Technology Corporation:

         The undersigned hereby irrevocably elects to purchase _____________
shares of common stock, par value $.00001 per share, of American Technology
Corporation ("Common Stock"), pursuant to Warrant No. [ ], originally issued
July 11, 2003 (the "Warrant"), and, if such Holder is not utilizing the cashless
exercise provisions set forth in the Warrant, encloses herewith $________ in
cash, certified or official bank check or checks or other immediately available
funds, which sum represents the aggregate Exercise Price (as defined in the
Warrant) for the number of shares of Common Stock to which this Exercise Notice
relates, together with any applicable taxes payable by the undersigned pursuant
to the Warrant.

         By its delivery of this Exercise Notice, the undersigned represents and
warrants to the Company that in giving effect to the exercise evidenced hereby
the Holder will not beneficially own in excess of the number of shares of Common
Stock (determined in accordance with Section 13(d) of the Securities Exchange
Act of 1934) permitted to be owned under Section 11 of this Warrant to which
this notice relates.

         The undersigned requests that certificates for the shares of Common
Stock issuable upon this exercise be issued in the name of

                                                PLEASE INSERT SOCIAL SECURITY OR
                                                TAX IDENTIFICATION NUMBER

                         (Please print name and address)

<PAGE>


                           Warrant Shares Exercise Log
                           ---------------------------
<TABLE>
<CAPTION>

----------------------------- ----------------------------- ---------------------------------- ---------------------
Date                          Number of Warrant Shares      Number of Warrant Shares           Number of Warrant
                              Available to be Exercised     Exercised                          Shares Remaining to
                                                                                               be Exercised
----------------------------- ----------------------------- ---------------------------------- ---------------------
<S>                           <C>                           <C>                                <C>











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

</TABLE>

<PAGE>


                               FORM OF ASSIGNMENT

         [To be completed and signed only upon transfer of Warrant]

         FOR VALUE RECEIVED, the undersigned hereby sells, assigns and transfers
unto ________________________________ the right represented by the within
Warrant to purchase ____________ shares of Common Stock of American Technology
Corporation to which the within Warrant relates and appoints ________________
attorney to transfer said right on the books of the Company with full power of
substitution in the premises.

Dated:   _______________, ____

                                         ---------------------------------------
                                         (Signature must conform in all respects
                                         to name of holder as specified on the
                                         face of the Warrant)



                                         ---------------------------------------
                                         Address of Transferee

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

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


In the presence of:


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