EXHIBIT 23.1 CONSENT OF INDEPENDENT CERTIFIED PUBLIC ACCOUNTANTS American Technology Corporation San Diego, California We hereby consent to the incorporation by reference in the Prospectus constituting a part of this Registration Statement of our report dated November 5, 1999 relating to the financial statements and schedules of American Technology Corporation appearing in the Company's Annual Report on Form 10-K for the year ended September 30, 1999. We also consent to the reference to us under the caption "Experts" in the Prospectus. BDO SEIDMAN, LLP Denver, Colorado April 27, 2000