Sound absorbing body

Details Sound absorbing body Sound absorbing body

2007-10-17

2008-08-26

Edwards, N (Department: 1794)

Stock material or miscellaneous articles

Structurally defined web or sheet

Honeycomb-like

C428S073000, C181S286000, C181S288000, C181S294000

Reexamination Certificate

active

07416773

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 (1) includes: an organic hybrid sheet (2) constituted from an organic low-molecular material which is spread in a matrix polymer; and a gastight air cell (3) which is closely provided at a backside (2a) 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.

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