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:
Apr. 09, 2024
Filed:
Sep. 11, 2020
The University of Tokyo, Tokyo, JP;
Kogakuin University, Tokyo, JP;
Foster Electric Company, Limited, Akishima-shi, JP;
Tsutomu Kaizuka, Tokyo, JP;
Kimihiko Nakano, Tokyo, JP;
Yoshio Koike, Akishima, JP;
Yoshiteru Uchida, Akishima, JP;
Manabu Sasajima, Akishima, JP;
The University of Tokyo, Tokyo, JP;
KOGAKUIN UNIVERSITY, Tokyo, JP;
Foster Electric Company, Limited, Akishima, JP;
Abstract
Proposed is an acoustic output device that obtains enough distance attenuation to achieve localization of a sound field by controlling the driving of a loudspeaker array by use of a more compact shape. The acoustic output devicecomprises: a loudspeaker arraythat includes a plurality of loudspeakers---N arranged in a two-dimensional plane; and an amplifier arraythat includes a plurality of amplifiers---N that control the amplitude and phase of the drive signals for each loudspeaker according to the eigenvectors of the predetermined radiation mode of the loudspeaker array