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:
Nov. 18, 2025
Filed:
Mar. 29, 2023
Applicant:
Foster Electric Company, Limited, Tokyo, JP;
Inventor:
Takeshi Yamamoto, Akishima, JP;
Assignee:
FOSTER ELECTRIC COMPANY, LIMITED, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R 3/04 (2006.01); H04R 1/02 (2006.01); H04R 1/28 (2006.01); H04R 9/02 (2006.01); H04R 9/04 (2006.01); H04R 9/06 (2006.01);
U.S. Cl.
CPC ...
H04R 3/04 (2013.01); H04R 1/025 (2013.01); H04R 1/2826 (2013.01); H04R 9/043 (2013.01); H04R 9/06 (2013.01); H04R 9/025 (2013.01); H04R 2430/01 (2013.01);
Abstract
A speaker device includes: a limiting unit that limits a signal band of a sound source signal that has been input; a speaker unit that includes a diaphragm; a housing that houses the speaker unit; and a drive circuit that, based on the sound source signal with the limited signal band, outputs a control signal that causes the diaphragm of the speaker unit to vibrate, wherein: the limiting unit limits the sound source signal to a frequency band including a peak frequency of frequency characteristics of an amplitude of the speaker unit in accordance with a shape of the speaker unit and a shape of the housing.