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:
Jan. 17, 2012
Filed:
Dec. 01, 2008
Fuminori Tanaka, Osaka, JP;
Ryusuke Horibe, Osaka, JP;
Shigeo Maeda, Hyogo, JP;
Takeshi Inoda, Osaka, JP;
Rikuo Takano, Ibaraki, JP;
Kiyoshi Sugiyama, Tokyo, JP;
Toshimi Fukuoka, Kanagawa, JP;
Masatoshi Ono, Ibaraki, JP;
Fuminori Tanaka, Osaka, JP;
Ryusuke Horibe, Osaka, JP;
Shigeo Maeda, Hyogo, JP;
Takeshi Inoda, Osaka, JP;
Rikuo Takano, Ibaraki, JP;
Kiyoshi Sugiyama, Tokyo, JP;
Toshimi Fukuoka, Kanagawa, JP;
Masatoshi Ono, Ibaraki, JP;
Funai Electric Co., Ltd., Osaka, JP;
Funai Electric Advanced Applied Technology Research Institute Inc., Osaka, JP;
Abstract
A microphone unit includes: a partition member, including a vibration film configured to be vibrated by sound; a housing, defining an inner space, and formed with a first opening and a second opening, the inner space being divided into a first space and a second space by the partition member, the first space adapted to be communicated with an outer space via the first opening, and the second space adapted to be communicated with the outer space via the second opening; and a shutter, configured to close one of the first and second openings; and an amplifier, configured to: amplify an electric signal at a first gain when the shutter closes the one of the first and second openings; and amplify the electric signal at a second gain that is larger than the first gain when first and second openings are opened.