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:
Aug. 26, 2008
Filed:
Oct. 17, 2007
Kunio Hiyama, Hamamatsu, JP;
Masuhiro Okada, Kikugawa, JP;
Emiko Suzuki, Legal Representative, Hamamatsu, JP;
Yasutaka Nakamura, Hamamatsu, JP;
Kunio Hiyama, Hamamatsu, JP;
Masuhiro Okada, Kikugawa, JP;
Emiko Suzuki, legal representative, Hamamatsu, JP;
Yasutaka Nakamura, Hamamatsu, JP;
Yamaha Corporation, Hamamatsu-shi, JP;
Abstract
In order to provide a sound-absorbing body which has both a thin thickness and improved sound-absorption characteristics with regard to a low tone range sounds, the sound-absorbing body () includes: an organic hybrid sheet () constituted from an organic low-molecular material which is spread in a matrix polymer; and a gastight air cell () which is closely provided at a backside () of the organic hybrid sheet, wherein the organic hybrid sheet indicates both a sound-absorption peak of a random incidence sound-absorption coefficient at a frequency band of 400 Hz or lower and another sound-absorption peak when the organic hybrid sheet is vibrated by applying air vibration caused by sound, because of adhering the organic hybrid sheet to the gastight air cell.