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:
May. 24, 2016
Filed:
Jul. 14, 2011
Takeshi Inoda, Osaka, JP;
Ryusuke Horibe, Osaka, JP;
Fuminori Tanaka, Osaka, JP;
Shuji Umeda, Osaka, JP;
Takeshi Inoda, Osaka, JP;
Ryusuke Horibe, Osaka, JP;
Fuminori Tanaka, Osaka, JP;
Shuji Umeda, Osaka, JP;
Funai Electric Co., Ltd., Osaka, JP;
Abstract
A microphone unit () is provided with an electro-acoustic transducer () which converts acoustic signals into electric signals on the basis of the oscillation of a diaphragm (), and a housing () which contains the electro-acoustic transducer (). The housing () is provided with: a first sound conduction space (SP) that guides sound waves from the outside to one side of the diaphragm () via at least one first aperture () formed on the exterior of the housing (); and a second sound conduction space (SP) that guides sound waves from the outside to the other side of the diaphragm () via at least one second aperture () formed on the exterior of the housing (). The total square area of at least one first aperture () and the total square area of at least one second aperture () are not the same.