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:
Mar. 12, 2013
Filed:
Jan. 24, 2008
Applicant:
Junichi Watanabe, Kawasaki, JP;
Inventor:
Junichi Watanabe, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R 1/02 (2006.01); H04R 5/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
In a sound receiver, a sound wave is directly received by microphones at a predetermined phase difference. The microphones are arranged in opening cavities of a casing, at positions that are different from the volume center points of the opening cavities. The microphones are supported by supporting springs in a state of not closely contacting inner peripheral walls. The sound wave received by the microphones is input to a signal processing unit and after a signal component in a predetermined low frequency band is removed by a filter, the resulting sound wave is amplified by an amplifier and is made in phase by a phase shifter and output.