SOUND ABSORPTION CHARACTERISTIC STRUCTURE

Title:

SOUND ABSORPTION CHARACTERISTIC STRUCTURE

Document Type and Number:

WIPO Patent Application WO/2012/008225

Kind Code:

A1

Abstract:

The present invention is capable of, even when external force that generates sound frequency is applied, absorbing noise generated thereby and preventing the noise from becoming a noise source for the surroundings thereof. A sound absorption characteristic structure is provided with a surface layer (20) which has pores (21) formed in the surface (20A) thereof, and a porous layer (10) which has communication paths (24) communicating with the pores (21), and acoustic holes (14) each formed in the inner part deeper than the surface layer (20) in which the pores (21) are formed, communicating with the communication path (24), and having a larger volume than the volumes of the pore (21) formed in the surface (20A) and the communication path (24), and is given a sound absorption characteristic and/or a sound blocking characteristic by the pores (21) in the surface (20A), the communication paths (24) and the acoustic holes (14) in the porous layer (10). Consequently, sound absorption control including sound blocking in a predetermined sound frequency band becomes possible, and a high sound absorption characteristic can be given.

Inventors:

KAWAI JUNICHI (JP)
MIHARA SATOSHI (JP)
KATO CHIE (JP)

Application Number:

PCT/JP2011/061881

Publication Date:

January 19, 2012

Filing Date:

May 24, 2011

Export Citation:

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Assignee:

AISHIN KAKO KK (JP)
KAWAI JUNICHI (JP)
MIHARA SATOSHI (JP)
KATO CHIE (JP)

International Classes:

G10K11/172

Foreign References:

JP2008096637A	2008-04-24
JPH10121598A	1998-05-12
JP2006265294A	2006-10-05
JPH09281974A	1997-10-31
JPH08260589A	1996-10-08
JPH0559345A	1993-03-09
JP2009274711A	2009-11-26
JP2010014888A	2010-01-21

Other References: