The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 23, 2009
Filed:
Sep. 14, 2007
James J. Croft, Iii, San Diego, CA (US);
Wensen Liu, San Diego, CA (US);
Clifton Wynn Thompson, San Diego, CA (US);
James J. Croft, III, San Diego, CA (US);
Wensen Liu, San Diego, CA (US);
Clifton Wynn Thompson, San Diego, CA (US);
American Technology Corporation, San Diego, CA (US);
Abstract
A directional acoustic device configured for producing a directional output along an acoustic axis, including at least one transducer configured to create at least two wave trains which are directed along differing pathways by at least one wave guide, and so disposed that in directions more than ninety degrees off the acoustic axis the SPL of the output is greatly diminished by cancellation effects between the wave trains; improvement over previous gradient and quarter-wave pipe directional systems being enabled.