Filed Pursuant to Rule 424(b)(3)
                                                          File Number 333-107635

PROSPECTUS

                                2,272,727 SHARES

                         AMERICAN TECHNOLOGY CORPORATION

                                  COMMON STOCK


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      We are registering our common stock for resale by the selling stockholders
identified in this prospectus.  We will not receive any of the proceeds from the
sale of shares by the selling  stockholders.  Our common  stock is listed on the
Nasdaq  SmallCap  Market under the symbol  "ATCO." The closing sale price of our
common stock,  as reported on the Nasdaq SmallCap Market on August 14, 2003, was
5.80 per share.

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

     Investing  in our common  stock  involves a high degree of risk.  See "Risk
Factors,"  beginning on page 3. Neither the Securities  and Exchange  Commission
nor any  state  securities  commission  has  approved  or  disapproved  of these
securities  or  determined  if this  prospectus  is  truthful or  complete.  Any
representation to the contrary is a criminal offense.

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                The date of this prospectus is August 18, 2003.





                                   THE COMPANY

      We  are  a  consumer   electronics   company  that  develops  and  markets
proprietary  sound  reproduction  products,  components  and  technologies.  Our
primary  marketing  focus  is  on  providing  sound  reproduction  products  and
components   to  customers  and   licensing   our   technologies   for  customer
applications. Our primary sound technologies are:

     o    HSS(R), HyperSonic(R) Sound Technology

     o    LRAD(TM)and HIDA(TM)

     o    NeoPlanar(TM) Technology

     o    PureBass(TM), Woofer Technology

     HyperSonic  Sound (HSS)  technology is a new method of sound  reproduction.
Sound is generated in an air column using  ultrasonic  frequencies,  those above
the normal range of hearing.  Our proprietary  electronic  process  generates an
ultrasonic  beam to interact in mid-air  producing wide spectrum audio along the
beam.  The sound beam has a very high  degree of  directionality  and  maintains
sound  volume  over  longer   distances  than   traditional   methods  of  sound
reproduction.  We believe  HyperSonic  Sound has unique  features  useful in new
sound applications.  We are currently shipping production HSS units to customers
worldwide  for  evaluation  in markets  including  retailing,  point-of-purchase
displays, museums, trade show booths, law enforcement,  television, expositions,
transportation, government and military.

     Our Long Range  Acoustic  Device (LRAD)  technology is based in part on our
HSS  technology  but is subject  to  additional  pending  patents  and  distinct
marketing  efforts.  LRAD employs  proprietary  techniques  to produce  variable
intensity directional  acoustical sound intended for use primarily in long-range
delivery of directional sound information, effectively a supercharged megaphone.
LRAD is  employed as a  long-range  hailing  and  warning  system  with  minimal
distraction to others not in the directed beam. One version of this  technology,
our High  Intensity  Directional  Acoustics  (HIDA)  technology,  has  potential
application as a scaleable  nonlethal  weapon.  Our high  intensity  directional
technology has been developed in part from  sponsored  research and  development
fees obtained from Bath Iron Works, a General  Dynamics  company.  LRAD and HIDA
technology-based   devices  have  been  successfully   demonstrated  to  various
military,  government and commercial  parties and commercial  deliveries of LRAD
products commenced in May 2003.

     NeoPlanar  technology is a thin film magnetic  speaker that can be produced
as thin as 1/8".  We believe the novel  films and  magnetic  materials  employed
results in superior sound quality,  reduced  distortion and greater sound volume
for a given  size  than  traditional  planar  (flat  or thin)  magnetic  speaker
devices.  Our  NeoPlanar  speaker  technology  is  targeted  at the  automotive,
multimedia, home, professional and marine speaker markets. We have licensed this
technology  on  a  nonexclusive   basis  to  Harman   International   Industries
Incorporated  for the  automotive  market and have  produced and sold  NeoPlanar
speaker components for installation in outside  entertainment,  luxury yacht and
military ship applications.

     Our PureBass  extended  range woofer was  designed to  complement  our high
performance  NeoPlanar technology as well as other loudspeakers  including those
used in professional and consumer applications.  PureBass employs unique cabinet
construction and vent configurations along with multiple acoustic filters, which
we  believe  produces  improved  performance.   We  believe  PureBass  minimizes
distortion, provides high output for its size, and results in lower system costs
when  compared to  conventional  woofer  systems.  It provides a high  frequency
interface  with upper range  satellite  speaker  systems.  We are marketing this
technology as a complement to our NeoPlanar and other flat speaker technologies.

     Our  objective is to be a leader in  developing,  marketing  and  licensing
innovative  sound  reproduction  products and components which address large and
expanding  domestic  and  international  consumer,  commercial  electronics  and
military  markets.   We  seek  to  have  our  sound  products  become  important
alternatives to conventional  loudspeakers in target market segments and to open
new sound  applications in market segments not currently  served by conventional
sound   devices.   We  believe  it  is  becoming   increasingly   difficult  for
manufacturers  to  differentiate  their  sound  reproduction  products  to offer
consumers  new  choices.  We also  believe  the rapid  emergence  of flat  panel
computer  and  television  monitors  and the large  computer  multimedia  market
provide growing opportunities for our products.

     We have 33 employees  including an innovative  engineering  and development
team of 15 persons. Each of our four sound technologies is the subject of issued
or pending patents and as of the date of this prospectus we had 28 U.S.  patents
issued with 27 pending U.S.  patents and others in various stages of preparation
or filing.  We also have multiple  foreign patents issued or pending.  We invest
significant  resources  in our  intellectual  property  and  consider it to be a
significant  asset  of our  company.



                                       2


We  have  also  developed  and own  other  technologies  in  various  stages  of
development.  Our  strategy  is to focus on  exploiting  our sound  reproduction
technologies  and  to  license  or  sell  other  technologies  incubated  by our
development team.

      The number of shares included in this prospectus is approximately 12.1% of
our common  shares  outstanding  on July 28, 2003.  The number of common  shares
outstanding does not include 454,547 shares included in this prospectus that are
issuable only upon the exercise of stock purchase warrants.

      Our shares  trade  through  the Nasdaq  SmallCap  Market  under the symbol
"ATCO." Our address is 13114 Evening Creek Drive South,  San Diego,  California,
and our  telephone  number is  858-679-2114.  Our  Internet  site is  located at
www.atcsd.com.  The  information  found  on our  Web  site  is not  part of this
prospectus.


                                  RISK FACTORS

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

We have a history of net  losses.  We expect to continue to incur net losses and
we may not achieve or maintain  profitability.  Our  independent  auditors  have
raised substantial doubt about our ability to continue as a going concern.

       We have incurred  significant  operating losses and anticipate  continued
losses in fiscal  2003.  At March 31,  2003,  we had an  accumulated  deficit of
$31,725,995.  Due to our net losses and our prior need for additional capital to
sustain  operations,  our independent  auditors noted in their November 19, 2002
report on our annual  financial  statements for the fiscal year ended  September
30, 2002 a substantial  doubt about our ability to continue as a going  concern.
We need to  generate  additional  revenue to be  profitable  in future  periods.
Failure to achieve  profitability,  or maintain  profitability if achieved,  may
cause our stock price to decline.

We are an early stage  company  introducing  new products and  technologies.  If
commercially  successful  products  do not result  from our  efforts,  we may be
unprofitable or forced to cease operations.

       Our  HSS,  NeoPlanar,  PureBass  and  LRAD/HIDA  technologies  have  only
recently been  introduced to market and are still being  improved.  Commercially
viable sound  technology  systems may not be successfully and timely produced by
original equipment  manufacturers (OEMs) due to the inherent risks of technology
development, new product introduction,  limitations on financing,  manufacturing
problems,  competition,  obsolescence, loss of key technical personnel and other
factors.  Our revenues from our sound  technology have been limited to date, and
we cannot  guarantee  significant  revenues in the future.  The  development and
introduction  of our sound  technology  has taken  longer  than  anticipated  by
management and could be subject to additional  delays.  We have also experienced
manufacturing  quality control problems with some of our initial  commercial HSS
units,  and we may not be able to resolve  future  manufacturing  problems  in a
timely and cost effective  manner.  Products  employing our sound technology may
not achieve  market  acceptance.  Our various  sound  projects  are high risk in
nature, and unanticipated  technical  obstacles can arise at any time and result
in  lengthy  and  costly  delays  or  result  in a  determination  that  further
exploitation is unfeasible.  If we do not  successfully  exploit our technology,
our financial  condition and results of operations and business  prospects would
be adversely affected.

Portable consumer  products were the primary source of our historical  revenues.
You cannot rely on period-to-period  comparisons of our results of operations as
an indication of future performance.

       We derived  most of our  historical  revenues  from the sale of  portable
consumer  electronics  products.  We expect future  revenues  will  primarily be
generated  from  our  proprietary   sound   reproduction  and  other  electronic
technologies, but there can be no assurance we will achieve substantial revenues
from these technologies.  If we do not achieve  substantial  revenues from these
technologies, you may not be able to rely on period-to-period comparisons of our
results of operations as an indication of future performance.



                                       3


We do not have the ability to predict future  operating  results.  Our quarterly
and  annual  revenues  will  likely be subject  to  fluctuations  caused by many
factors,  any of which  could  result in our  failure  to  achieve  our  revenue
expectations.

       Our historical revenues derived almost exclusively from portable consumer
products,  and we expect a majority of future  revenues to be generated from our
sound   reproduction   technologies.   Revenues  from  our  sound   reproduction
technologies are expected to vary significantly due to a number of factors. Many
of these factors are beyond our control.  Any one or more of the factors  listed
below  or  other  factors  could  cause  us  to  fail  to  achieve  our  revenue
expectations. These factors include:

     o    our ability to develop and license our sound reproduction technologies
          or our ability to supply  components  to  customers,  distributors  or
          OEMs;

     o    market  acceptance  of and  changes  in  demand  for  products  of our
          customers;

     o    gains or losses of significant  customers,  distributors  or strategic
          relationships;

     o    unpredictable volume and timing of customer orders;

     o    the availability, pricing and timeliness of delivery of components for
          our products and OEM products;

     o    fluctuations  in  the  availability  of   manufacturing   capacity  or
          manufacturing yields and related manufacturing costs;

     o    the timing of new  technological  advances,  product  announcements or
          introductions by us, by our licensees and by our competitors;

     o    product  obsolescence  and the management of product  transitions  and
          inventory;

     o    production  delays by  customers,  distributors,  OEMs or by us or our
          suppliers;

     o    seasonal fluctuations in sales;

     o    the  conditions of other  industries,  such as military and commercial
          industries, into which our technologies may be licensed;

     o    general consumer electronics industry conditions, including changes in
          demand and  associated  effects on inventory and inventory  practices;
          and

     o    general  economic  conditions that could affect the timing of customer
          orders  and  capital  spending  and result in order  cancellations  or
          rescheduling.

     Some or all of these factors could adversely affect demand for OEM products
incorporating  our sound  reproduction  technologies,  and  therefore  adversely
affect our future operating results.

     Most of our operating  expenses are relatively  fixed in the short term. We
may be unable to rapidly adjust spending to compensate for any unexpected  sales
or license revenue shortfalls, which could harm our quarterly operating results.
We do not  have  the  ability  to  predict  future  operating  results  with any
certainty.

Our  expenses  may vary from  period to period,  which  could  affect  quarterly
results and our stock price.

     If we incur additional  expenses in a quarter in which we do not experience
increased revenue,  our results of operations would be adversely affected and we
may incur larger losses than  anticipated  for that quarter.  Factors that could
cause our expenses to fluctuate from period to period include:

     o    the timing and extent of our research and development efforts;

     o    the extent of marketing  and sales efforts to promote our products and
          technologies; and

     o    the timing of personnel and consultant hiring.

Sound  reproduction  markets are subject to rapid  technological  change, so our
success will depend on our ability to develop and introduce new technologies.

     Technology and standards in the sound reproduction  markets evolve rapidly,
making timely and cost-effective  product innovation essential to success in the
marketplace. The introduction of products with improved technologies or features
may render our  technologies  obsolete and  unmarketable.  If we cannot  develop
products  in a  timely  manner  in  response  to  industry  changes,  or if  our
technologies  do not perform well, our business and financial  condition will be
adversely  affected.  The life  cycles  of our  technologies  are  difficult  to
estimate,  particularly  those such as HSS and  LRAD/HIDA for which there are no
established  markets.  As a result,  our technologies,  even if successful,  may
become obsolete before we recoup our investment.




                                       4


Our HSS  technology  is subject to  government  regulation,  which could lead to
unanticipated expense or litigation.

       Our HyperSonic Sound technology emits ultrasonic vibrations,  and as such
is  regulated  by the Food  and Drug  Administration.  In the  event of  certain
unanticipated  defects in an HSS  product,  a customer  or we may be required to
comply with FDA requirements to remedy the defect and/or notify consumers of the
problem.  This  could  lead  to  unanticipated  expense,  and  possible  product
liability litigation against a customer or us. Any regulatory impediment to full
commercialization of our HSS technology, or any of our other technologies, could
adversely  affect our results of  operations.  For a further  discussion  of the
regulation  of our HSS  technology,  see Part I, Item 1 of our Annual  Report on
Form 10-K, under the heading "Government Regulation."

We may not be successful in obtaining the necessary  licenses required for us to
sell some of our products abroad.

       Licenses for the export of certain of our  products may be required  from
government agencies in accordance with various statutory authorities,  including
the Export  Administration  Act of 1979, the  International  Emergency  Economic
Powers Act, the Trading  with the Enemy Act of 1917 and the Arms Export  Control
Act of 1976.  We may not be able to obtain the  necessary  licenses  in order to
conduct business abroad.  In the case of certain sales of defense  equipment and
services  to foreign  governments,  the U.S.  Department  of State  must  notify
Congress at least 15 to 30 days, depending on the size and location of the sale,
prior to authorizing these sales.  During that time, Congress may take action to
block the proposed sale.  Failure to receive required  licenses or authorization
would hinder our ability to sell our products outside the United States.

Many potential  competitors who have greater resources and experience than we do
may develop products and technologies that make ours obsolete.

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

Commercialization of our sound technologies depends on collaborations with other
companies.  If we are not able to maintain or find  collaborators  and strategic
alliance  relationships  in the future,  we may not be able to develop our sound
technologies and products.

       As we do not have the  production,  marketing  and selling  resources  to
commercialize  our products on our own,  our  strategy is to establish  business
relationships  with leading  participants in various segments of the electronics
and sound reproduction markets to assist us in producing,  marketing and selling
products that include our sound technologies.

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

We are dependent on outside suppliers and manufacturers.  Our relationships with
two key manufacturers have recently terminated, and our new manufacturer has not
yet produced our products in  quantity.  Disruptions  in supply could  adversely
affect us.

       We recently  terminated our  manufacturing  relationship  with HST, Inc.,
formerly our  sub-contract  manufacturer of our HSS and NeoPlanar  products.  In
addition,  Amtec Manufacturing,  the sole manufacturer of our PureBass subwoofer
units,  recently  went  out  of  business.  We  have  contracted  with  Magnotek
Manufacturing  to manufacture all three of these products,  but Magnotek has not
yet commenced  large scale  production of our  products.  Magnotek's  production
start-up  requirements  may cause  longer  lead times,  particularly  for larger
orders,  which could have a negative  impact on our ability to  introduce  these
technologies in volume.  The agreement with Magnotek is non-exclusive and either
party  may  terminate  the  agreement  on 90 days  advance  notice.  Any loss or
disruption of supply could reduce future revenues, adversely affecting financial
condition and results of operations.



                                       5


Any inability to adequately protect our proprietary  technologies could harm our
competitive position.

       We are heavily  dependent  on patent  protection  to secure the  economic
value of our technologies.  We have both issued and pending patents on our sound
reproduction technologies and we are considering additional patent applications.
Patents  may not be issued for some or all of our pending  applications.  Claims
allowed  from  existing  or pending  patents may not be of  sufficient  scope or
strength to protect the economic value of our  technologies.  Issued patents may
be  challenged  or  invalidated.  Further,  we may not  receive  patents  in all
countries  where our products can be sold or licensed.  Our competitors may also
be able to design around our patents.  The electronics industry is characterized
by vigorous protection and pursuit of intellectual property rights or positions,
which  have  resulted  in  significant   and  often   protracted  and  expensive
litigation.  There is currently no pending  litigation against us that questions
our intellectual property rights. Third parties may charge that our technologies
or products infringe their patents or proprietary rights.  Problems with patents
or other rights could potentially increase the cost of our products, or delay or
preclude our new product  development  and  commercialization.  If  infringement
claims against us are deemed valid, we may be forced to obtain  licenses,  which
might not be available on acceptable terms or at all. Litigation could be costly
and  time-consuming  but may be  necessary to protect our future  patent  and/or
technology  license  positions,  or to defend  against  infringement  claims.  A
successful challenge to our sound technology could have a negative effect on our
business prospects.

If our key employees do not continue to work for us, our business will be harmed
because competition for replacements is intense.

       Our  performance  is  substantially  dependent on the  performance of our
executive officers and key technical employees,  including Elwood G. Norris, our
Chairman, and James M. Irish, our CEO. We are dependent on our ability to retain
and  motivate  high  quality  personnel,  especially  highly  skilled  technical
personnel.  Our future success and growth also depend on our continuing  ability
to identify, hire, train and retain other highly qualified technical, managerial
and sales personnel.  Competition for such personnel is intense,  and we may not
be able to attract,  assimilate  or retain  other  highly  qualified  technical,
managerial or sales personnel in the future. The inability to attract and retain
the necessary technical, managerial or sales personnel could cause our business,
operating results or financial condition to suffer.

We may issue preferred stock in the future, and the terms of the preferred stock
may reduce the value of your common stock.

       We are authorized to issue up to 5,000,000  shares of preferred  stock in
one or more series.  Our board of directors  may  determine  the terms of future
preferred  stock  without  further  action  by  our  stockholders.  If we  issue
additional  preferred  stock, it could affect your rights or reduce the value of
your common stock.  In particular,  specific rights granted to future holders of
preferred  stock could be used to restrict our ability to merge with or sell our
assets to a third party.  These terms may include voting rights,  preferences as
to dividends and liquidation, conversion and redemption rights, and sinking fund
provisions.

Our Series D and Series E Preferred  Stock  financings may result in dilution to
our common  stockholders.  The holders of Series D and Series E Preferred  Stock
will receive more common  shares on conversion if the market price of our common
stock declines.

       Dilution of the per share value of our common  shares  could  result from
the conversion of the outstanding  Series D and Series E Preferred Stock. In May
2002,  we issued a total of  235,400  shares  of our  Series D  Preferred  Stock
185,400 of these shares have been  converted  into 695,266  common  shares,  and
50,000  shares of Series D Preferred  Stock  remain  outstanding  as of July 28,
2003. In March 2003, we issued 343,250 shares of Series E Preferred Stock. 5,000
of these shares have been converted into 15,679 common shares and 338,250 shares
of Series E Preferred Stock remain outstanding as of July 28, 2003.

       The holders of our  outstanding  shares of Series D  Preferred  Stock may
convert these shares into shares of our common stock at a conversion price equal
to the  lower of $4.50 or 90% of  volume-weighted  average  price of our  common
stock for the five trading days prior to conversion.  The conversion rate cannot
however be lower than lower than  $2.00.  The $2.00  floor  price may however be
adjusted  downward if we sell  securities  for less than an  effective  price of
$2.00 per share. As of July 28, 2003, the outstanding  50,000 shares of Series D
Preferred Stock are convertible  into an aggregate of 119,369 common shares.  In
addition,  the Series D Preferred Stock purchasers received warrants to purchase
2.2 common  shares for each share of Series D  Preferred  Stock  purchased.  The
exercise price of the warrants was initially $4.50 per share, but was reduced to
$3.01 per share as a result of  anti-dilution  provisions in the  warrants.  The
exercise  price will be subject to further  reduction if we sell  securities for
less than an effective price of $3.01 per share.



                                       6


       The holders of our  outstanding  shares of Series E  Preferred  Stock may
convert these shares into shares of our common stock at a conversion price equal
to the  lower of $3.25 or 90% of  volume-weighted  average  price of our  common
stock for the five trading days prior to conversion.  The conversion rate cannot
however be lower than $3.25 before September 30, 2003, or lower than $2.00 after
such date.  As of July 28,  2003,  the  338,250  outstanding  shares of Series E
Preferred Stock are convertible into an aggregate of 1,066,785 common shares. In
addition,  the Series E Preferred Stock purchasers received warrants to purchase
1.5 common  shares for each share of Series E Preferred  Stock  purchased  at an
exercise price of $3.25 per share.

      Holders of our common stock could experience substantial dilution from the
conversion  of the Series D and Series E  Preferred  Stock and  exercise  of the
related warrants.  As a result of the floating  conversion price, the holders of
Series D and  Series E  Preferred  Stock  will  receive  more  common  shares on
conversion  if the price of our common shares  declines.  To the extent that the
Series D or Series E stockholders convert and then sell their common shares, the
common stock price may decrease due to the additional shares in the market. This
could allow the Series D or Series E stockholders  to receive greater amounts of
common  stock,  the  sales of which  would  further  depress  the  stock  price.
Furthermore,  the  significant  downward  pressure on the  trading  price of our
common  stock as  Series D and  Series E  Preferred  Stock and  related  warrant
holders convert or exercise these securities and sell the common shares received
could  encourage  short  sales by the holders of Series D and Series E Preferred
Stock and the related warrants, or other stockholders.  This would place further
downward  pressure  on the  trading  price of our  common  stock.  Even the mere
perception of eventual  sales of common  shares issued on the  conversion of the
Series D and Series E Preferred Stock or exercise of the related  warrants could
lead to a decline in the trading price of our common stock.

Our stock price is volatile and may continue to be volatile in the future.

       Our common stock trades on the Nasdaq SmallCap  Market.  The market price
of our common stock has  fluctuated  significantly  to date. In the future,  the
market  price of our common stock could be subject to  significant  fluctuations
due  to  general  market  conditions  and  in  response  to   quarter-to-quarter
variations in:

       o      our anticipated or actual operating results;

       o      developments concerning our sound reproduction technologies;

       o      technological innovations or setbacks by us or our competitors;

       o      conditions in the consumer electronics market;

       o      announcements of merger or acquisition transactions; and

       o      other   events  or  factors  and  general   economic   and  market
              conditions.

       The stock market in recent years has experienced extreme price and volume
fluctuations  that have affected the market price of many technology  companies,
and  that  have  often  been  unrelated  or  disproportionate  to the  operating
performance of companies.

                                 USE OF PROCEEDS

      We will not  receive  any  proceeds  from the sale of the shares of common
stock  offered by the selling  stockholders.  An aggregate of 454,547  shares of
common stock offered by this  prospectus  are issuable only upon the exercise of
stock purchase warrants by the selling stockholders.  Upon exercise of the stock
purchase warrants we could receive cash proceeds of up to $3,068,193.  There can
be no  assurance  any of  these  warrants  will  be  exercised  by  the  selling
stockholders,  that any of the  underlying  shares of common  stock will be sold
hereunder or that we will receive any proceeds from the stock purchase warrants.

                 ISSUANCE OF SECURITIES TO SELLING STOCKHOLDERS

        We entered into various purchase  agreements,  each dated as of July 11,
2003, with the selling stockholders,  who paid us an aggregate of $10 million in
gross proceeds in  consideration  for 1,818,180  shares of our common stock at a
price of $5.50 per share.  Each investor also received a warrant to purchase 25%
of the number of shares of common stock purchased at an exercise price of $6.75,
subject  to  adjustment  if we sell  securities  in the  future for less than an
effective price of $6.75 per share. The warrants are exercisable  until July 10,
2007, and collectively  represent the right to purchase 454,547 shares of common
stock.  Each of the selling  stockholders  that  purchased  shares and  warrants
represented that it had acquired the securities for investment purposes only and
with no present intention of distributing those securities, except in compliance
with  all  applicable  securities  laws.  In  addition,   each  of  the  selling
stockholders  represented that it qualified as an "accredited  investor" as that
term is defined in Rule 501 under the Securities Act of 1933.



                                       7


         We agreed to give each  investor  in the  offering  the first  right to
participate in any proposed sale of equity securities by us until July 11, 2004.
This  right  does not apply to the  issuance  of  securities  upon  exercise  or
conversion of previously outstanding  securities,  to the grant of options under
company  plans,  to  certain  strategic  transactions,  or to a firm  commitment
underwriting that results in net proceeds to us of at least $10 million.

         We also  agreed to file  within  thirty  days  after July 11,  2003,  a
registration  statement,  of which this  prospectus  is a part,  to register the
resale by the selling  stockholders of the shares  purchased and the shares that
may be purchased  under the warrants.  We also agreed to use our best efforts to
have the registration  statement  declared  effective as soon as possible and in
any  event  within  ninety  days  after  July 11,  2003.  Once the  registration
statement  is  effective,  we have  agreed  to use our best  efforts  to keep it
effective for five years after the date the  registration  statement is declared
effective, or the earlier date when all of the shares covered by this prospectus
have been sold or may be sold without  volume  restrictions  in accordance  with
Rule 144(k) under the Securities Act. If we do not comply with our  registration
obligations,  we have  agreed  to pay to  each  selling  stockholder  liquidated
damages  of up to  0.05%  of its  investment  amount  per day that we are out of
compliance  with  our  registration  obligations.  We  have  also  agree  to pay
liquidated damages in that amount during any time that the exercisability of the
warrants is suspended.



                                       8


                              SELLING STOCKHOLDERS

      We are registering for resale certain shares of our common stock.

      The  following  table sets forth certain  information  as of July 18, 2003
with respect to certain  stockholders who purchased  securities through purchase
agreements dated as of July 11, 2003. This information is based upon information
provided by the selling stockholders.  The selling stockholders identified below
may have sold,  transferred  or otherwise  disposed of all or a portion of their
shares of common stock in transactions exempt from the registration requirements
of the Securities Act since the date as of which they provided this information.

      The term "selling  stockholder" includes the stockholders listed below and
their transferees, pledgees, donees or other successors.

      None of the selling  stockholders  has held any  position or office or had
any other material relationship with us or any of our predecessors or affiliates
within  the past three  years  other  than as a result of the  ownership  of our
securities.  We may amend or  supplement  this  prospectus  from time to time to
update the disclosure set forth in it.

      Each of the selling  stockholders  that is  affiliated  with a  registered
broker-dealer  purchased the shares  offered by this  prospectus in the ordinary
course of business  and, at the time of purchase of those  shares,  did not have
any plans to dispose of those shares.



                                                                    Common
                                                                    Stock          Total                            Shares of
                                                      Common      Underlying       Common        Maximum          Common Stock
                                                      Stock         Common      Beneficially      Shares              Owned
                                                   Acquired In       Stock       Owned Before    Offered              After
            Selling Stockholder                     Offering      Warrant (1)     Offering        Hereby             Offering
            -------------------                     ---------      ---------      ---------      ---------       -----------------
                   Name                               Number         Number        Number         Number         Number       %
                   ----                             ---------      ---------      ---------      ---------       ------    -------
                                                                                        
Special Situations Technology Fund L.P. (2)            44,637         11,159         55,796         55,796          --        --
Special Situations Technology Fund II L.P. (2)        228,091         57,023        285,114        285,114          --        --
Special Situations Cayman Fund, L.P. (2)              113,636         28,409        142,045        142,045          --        --
Special Situations Fund III, L.P. (2)                 340,908         85,227        426,135        426,135          --        --
Omicron Master Trust (3)                               45,454         11,364         56,818         56,818          --        --
Vertical Ventures Investments, LLC (4)                272,727         68,182        340,909        340,909          --        --
Langley Partners L.P. (5)                              45,454         11,364         56,818         56,818          --        --
SDS Merchant Fund L.P. (6)                            227,273         56,818        284,091        284,091          --        --
North Sound Legacy Fund LLC (7)                        14,318          3,580         17,898         17,898          --        --
North Sound Legacy Institutional Fund LLC (7)         144,773         36,193        180,966        180,966          --        --
North Sound Legacy International Ltd. (7)             159,091         39,773        198,864        198,864          --        --
BayStar Capital II, L.P. (8)                          181,818         45,455        227,273        227,273          --        --
                                                    ---------      ---------      ---------      ---------
                                                    1,818,180        454,547      2,272,727      2,272,727
                                                    =========      =========      =========      =========




(1)  Warrants  acquired  as of July 11, 2003 in  connection  with  purchases  of
     common stock by the selling  stockholders.  The  warrants  have an exercise
     price of $6.75,  subject to adjustment if we sell  securities in the future
     for less than an  effective  price of $6.75 per  share.  The  warrants  are
     exercisable until July 10, 2007.

(2)  MGP Advisors Limited Partnership, or MGP, is the general partner of Special
     Situations  Fund III,  L.P. AWM  Investment  Company,  Inc., or AWM, is the
     general partner of MGP and the general  partner of, and investment  adviser
     to Special Situations Cayman Fund, L.P. SST Advisers, L.L.C., or SSTA, is a
     general  partner  of,  and  investment   advisor  to,  Special



                                       9


     Situations Technology Fund, L.P. and Special Situations Technology Fund II,
     L.P.  Austin W. Marxe and David M.  Greenhouse are the principal  owners of
     MGP,  AWM,  and SSTA and are  principally  responsible  for the  selection,
     acquisition,  voting and  disposition  of the portfolio  securities by each
     investment  adviser on behalf of its fund.  Each of the foregoing  entities
     and persons disclaims  beneficial ownership of the shares and warrants held
     by any of Special  Situations  Technology  Fund, L.P.,  Special  Situations
     Technology Fund II, L.P.,  Special Situations Cayman Fund, L.P. and Special
     Situations Fund III, L.P.

(3)  Omicron Capital,  L.P., a Delaware limited  partnership  (Omicron Capital),
     serves as investment  manager to Omicron Master Trust, a trust formed under
     the  laws  of  Bermuda  (Omicron),   Omicron  Capital,   Inc.,  a  Delaware
     corporation  (OCI),  serves as  general  partner of  Omicron  Capital,  and
     Winchester Global Trust Company Limited  (Winchester) serves as the trustee
     of Omicron. By reason of such relationships, Omicron Capital and OCI may be
     deemed to share dispositive power over the shares of our common stock owned
     by Omicron,  and Winchester  may be deemed to share voting and  dispositive
     power  over the  shares  of our  common  stock  owned by  Omicron.  Omicron
     Capital,  OCI and  Winchester  disclaim  beneficial  ownership  of (3) such
     shares of our common stock.  Omicron  Capital has delegated  authority from
     the board of directors of Winchester  regarding  the  portfolio  management
     decisions  with respect to the shares of common stock owned by Omicron and,
     as of April 21, 2003,  Mr.  Olivier H. Morali and Mr.  Bruce T.  Bernstein,
     officers of OCI, have  delegated  authority  from the board of directors of
     OCI regarding the portfolio  management  decisions of Omicron  Capital with
     respect to the shares of common  stock owned by Omicron.  By reason of such
     delegated  authority,  Messrs.  Morali and Bernstein may be deemed to share
     dispositive  power over the shares of our common  stock  owned by  Omicron.
     Messrs.  Morali and Bernstein disclaim beneficial  ownership of such shares
     of our common  stock and  neither of such  persons  has any legal  right to
     maintain  such  delegated   authority.   Omicron  and  Winchester  are  not
     "affiliates"  of one  another,  as that  term is used for  purposes  of the
     Securities  Exchange  Act of 1934,  or of any  other  person  named in this
     prospectus as a selling stockholder.  No person or "group" (as that term is
     used in Section  13(d) of the Exchange Act or the SEC's  Regulation  13D-G)
     controls Omicron and Winchester

(4)  Mr. Joshua Silverman may be deemed to have voting and investment control of
     the securities held by Vertical  Ventures  Investments,  LLC. Mr. Silverman
     disclaims  beneficial  ownership of the  securities  beneficially  owned by
     Vertical Ventures Investments, LLC.

(5)  Langley  Capital,  LLC serves as the general  partner of Langley  Partners,
     L.P. Mr. Jeffrey Thorp is the Managing Member of Langley Capital, LLC. Each
     of Langley Capital,  LLC and Mr. Thorp disclaim beneficial ownership of the
     securities beneficially owned by Langley Partners, L.P.

(6)  SDS Capital Partners,  LLC, of which Steve Derby is the managing member, is
     the  general  partner  of SDS  Merchant  Fund,  L.P.,  and has  voting  and
     investment  power over the  securities  beneficially  owned by SDS Merchant
     Fund,  L.P.  Each of SDS  Capital  Partners,  LLC and  Mr.  Derby  disclaim
     beneficial  ownership of the securities  beneficially owned by SDS Merchant
     Fund, L.P.

(7)  Thomas McAuley is the managing member of North Sound Legacy Fund LLC, North
     Sound Legacy  Institutional Fund LLC, and North Sound Legacy  International
     Ltd., and has voting and investment power over the securities  beneficially
     owned by each such entity.  Mr. McAuley disclaims  beneficial  ownership of
     the securities beneficially owned by such entities.

(8)  BayStar Capital  Management,  LLC, of which Steve Derby,  Lawrence Goldfarb
     and Steven M. Lamar are the  managing  members,  is the general  partner of
     BayStar  Capital II, L.P., and share voting and  investment  power over the
     securities  beneficially  owned by BayStar Capital II, L.P. Each of BayStar
     Capital  Management,  LLC, Mr. Derby,  Mr.  Goldfarb and Mr. Lamar disclaim
     beneficial  ownership  of the  securities  beneficially  owned  by  BayStar
     Capital II, L.P.

                              PLAN OF DISTRIBUTION

      The selling  stockholders and any of their pledgees,  transferees,  donees
and  successors-in-interest  may,  from  time to time,  sell any or all of their
common  shares on any stock  exchange,  market or trading  facility on which the
shares  are traded or in private  transactions.  These  sales may be at fixed or
negotiated  prices.  The  selling  stockholders  may  use any one or more of the
following methods when selling shares:

     o    ordinary   brokerage   transactions  and  transactions  in  which  the
          broker-dealer solicits purchasers;

     o    block  trades  in which the  broker-dealer  will  attempt  to sell the
          shares as agent but may  position and resell a portion of the block as
          principal to facilitate the transaction;

     o    purchases  by  a   broker-dealer   as  principal  and  resale  by  the
          broker-dealer for its account;



                                       10


     o    an  exchange   distribution  in  accordance  with  the  rules  of  the
          applicable exchange;

     o    privately negotiated transactions;

     o    short sales

     o    broker-dealers  may  agree  with the  selling  stockholders  to sell a
          specified number of such shares at a stipulated price per share;

     o    a combination of any such methods of sale; and

     o    any other method permitted pursuant to applicable law.

      The selling  stockholders  may also sell  shares  under Rule 144 under the
Securities Act, if available, rather than under this prospectus.

      Broker-dealers  engaged by the selling  stockholders may arrange for other
brokers-dealers to participate in sales.  Broker-dealers may receive commissions
or discounts from the selling  stockholders  (or, if any  broker-dealer  acts as
agent  for the  purchaser  of  shares,  from the  purchaser)  in  amounts  to be
negotiated.  The  selling  stockholders  do not  expect  these  commissions  and
discounts to exceed what is customary in the types of transactions involved.

      The selling  stockholders may from time to time pledge or grant a security
interest in some or all of the shares  owned by them and, if they default in the
performance of their secured  obligations,  the pledgees or secured  parties may
offer and sell those shares from time to time under this prospectus, or under an
amendment to this prospectus under Rule 424(b)(3) or other applicable  provision
of the  Securities  Act of 1933  amending  the list of selling  stockholders  to
include  the  pledgee,  transferee,  donee or other  successors  in  interest as
selling stockholders under this prospectus.

      The selling  stockholders  also may transfer the shares of common stock in
other circumstances,  in which case the transferees,  pledgees,  donees or other
successors  in interest  will be the selling  beneficial  owners for purposes of
this prospectus.

      The  selling  stockholders  and any  broker-dealers  or  agents  that  are
involved  in selling  the shares may be deemed to be  "underwriters"  within the
meaning of the Securities Act in connection with such sales. In such event,  any
commissions  received  by such  broker-dealers  or agents  and any profit on the
resale  of the  shares  purchased  by  them  may be  deemed  to be  underwriting
commissions or discounts under the Securities Act. Each selling  stockholder has
informed us that it does not have any  agreement or  understanding,  directly or
indirectly, with any person to distribute the common stock.

      We are required to pay all fees and expenses  incident to the registration
of the shares.  We have agreed to  indemnify  the selling  stockholders  against
certain losses, claims, damages and liabilities, including liabilities under the
Securities Act.

      The selling  stockholders are subject to the applicable  provisions of the
Exchange Act and the rules and regulations  thereunder,  including Regulation M.
This regulation may limit the timing of purchases and sales of any of the shares
by the selling stockholders.  The anti-manipulation rules under the Exchange Act
may apply to sales of shares in the market and to the  activities of the selling
stockholders and their  affiliates.  Furthermore,  Regulation M may restrict the
ability of any person  engaged  in the  distribution  of the shares to engage in
market-making  activities  with  respect  to  the  particular  securities  being
distributed  for a period of up to five business  days before the  distribution.
These restrictions may affect the marketability of the shares and the ability of
any person or entity to engage in  market-making  activities with respect to the
shares.

                                  LEGAL MATTERS

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

                                     EXPERTS

      The annual financial statements and schedules incorporated by reference in
this prospectus  have been audited by BDO Seidman,  LLP,  independent  certified
public accountants,  to the extent and for the periods set forth in their report
incorporated  herein by  reference  (which  contains  an  explanatory  paragraph
relating to our ability to continue as a going concern), and incorporated herein
in reliance upon such report given upon the authority of said firm as experts in
auditing and accounting in giving said reports.



                                       11


                 DISCLOSURE REGARDING FORWARD-LOOKING STATEMENTS

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

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

                       WHERE YOU CAN GET MORE INFORMATION

      We are a reporting company and file annual, quarterly and current reports,
proxy statements and other information with the SEC. You may read and copy these
reports,  proxy  statements and other  information at the SEC's public reference
rooms in Washington,  D.C., New York, NY and Chicago, IL. You can request copies
of these  documents by writing to the SEC and paying a fee for the copying cost.
Please call the SEC at  1-800-SEC-0330  for more information about the operation
of the public  reference  rooms. Our SEC filings are also available at the SEC's
website at "http:\\www.sec.gov."
      The SEC allows us to "incorporate by reference"  information  that we file
with them,  which means that we can  disclose  important  information  to you by
referring you to those documents.  The information  incorporated by reference is
an important part of this  prospectus,  and information  that we file later with
the SEC will automatically update and supersede this information. We incorporate
by reference the documents listed below:


     o    Annual Report on Form 10-K for the year ended September 30, 2002 filed
          with the SEC on December  23,  2002,  as amended by Form 10-K/A  filed
          with the SEC on January 28, 2003;

     o    Quarterly  Reports on Form 10-Q for the  quarters  ended  December 31,
          2002, March 31, 2003 (as amended by Form 10-Q/A) and June 30, 2003;

     o    Current  Reports  on Form 8-K filed  with the SEC on  October 7, 2002,
          October 15, 2002,  March 6, 2003, May 28, 2003,  June 6, 2003 and July
          17, 2003; and

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

      All documents we file in the future  pursuant to Section 13(a),  13(c), 14
or 15(d) of the Exchange Act after the date of this  prospectus and prior to the
termination  of the  offering  are also  incorporated  by  reference  and are an
important part of this prospectus.

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

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


                                       12



================================================================================

      We have not authorized any dealer, salesperson or other person to give any
information or to make any  representations  not contained in this prospectus or
any prospectus  supplement.  You must not rely on any unauthorized  information.
This prospectus is not an offer of these  securities in any state where an offer
is not permitted.  The  information in this prospectus is current as of the date
of this prospectus. You should not assume that this prospectus is accurate as of
any other date.

                                2,272,727 SHARES

                         AMERICAN TECHNOLOGY CORPORATION

                                  COMMON STOCK




                                TABLE OF CONTENTS

                                                                         Page
                                                                         ----
The Company ...........................................................     2
Risk Factors ..........................................................     3
Use of Proceeds .......................................................     7
Issuance of Securities to Selling Stockholders.........................     7
Selling Stockholders ..................................................     9
Plan of Distribution ..................................................    10
Legal Matters .........................................................    11
Experts ...............................................................    11
Disclosure Regarding Forward-Looking Statements .......................    12
Where You Can Get More Information ....................................    12


                                 August 18, 2003


================================================================================