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:
Jul. 29, 2014
Filed:
May. 24, 2011
Junichi Kawai, Toyota, JP;
Satoshi Mihara, Toyota, JP;
Chie Kato, Toyota, JP;
Aisin Kako Kabushiki Kaisha, Aichi-ken, JP;
Abstract
To absorb a noise produced by an external force that generates an audio frequency even if it is applied thereto, and to make it hard to become a noise source to a surrounding area. It includes a surface layerhaving microscopic poresformed on a surfaceA, communicating passagescommunicating with the microscopic poresand a porous layerhaving sound poresthat are formed at an inner part deeper than the surface layerhaving the microscopic poresformed, communicate with the communicating passageand that have a volume larger than volumes of the microscopic poreformed on the surfaceA and the communicating passage. A sound absorption characteristic and/or a sound insulation characteristic is provided by the microscopic poresof the surfaceA, the communicating passagesof the porous layer, and the sound poresof the porous layer. Accordingly, sound absorption control including sound insulation in a predetermined audio frequency band can be achieved and a high sound absorption characteristic can be provided.