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Patent Searching and Data


Title:
SOUND PROOF STRUCTURE AND SOUND PROOF BODY
Document Type and Number:
WIPO Patent Application WO/2019/044589
Kind Code:
A1
Abstract:
Provided is a sound proof structure having a film member with a plurality of thorough-holes passing through the film member in the thickness direction, wherein the acoustic impedance Z0 of the film member given in the formula (1) below satisfies the formula (2) below, and a pore-size distribution histogram satisfies the formula (3) below: (1) (2) (3) Where r0 represents a pore radius that maximizes an aperture ratio σ in a pore-size distribution histogram function σ(r), σsum represents the total aperture ratio for all the through-holes, and t represents the thickness of the film member. The sound proof structure allows sound to be absorbed at a higher absorption rate over a wide band.

Inventors:
OHTSU AKIHIKO (JP)
HAKUTA SHINYA (JP)
YAMAZOE SHOGO (JP)
SUGAWARA YOSHIHIRO (JP)
Application Number:
PCT/JP2018/030805
Publication Date:
March 07, 2019
Filing Date:
August 21, 2018
Export Citation:
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Assignee:
FUJIFILM CORP (JP)
International Classes:
G10K11/16; G10K11/162; G10K11/168
Domestic Patent References:
WO2016060037A12016-04-21
Foreign References:
JPH0659680A1994-03-04
JP2017003948A2017-01-05
JP2004502201A2004-01-22
JP2007162253A2007-06-28
JP2007183447A2007-07-19
JP2011201123A2011-10-13
US4671859A1987-06-09
US4661219A1987-04-28
US4618405A1986-10-21
US4600482A1986-07-15
US4566960A1986-01-28
US4566958A1986-01-28
US4566959A1986-01-28
US4416972A1983-11-22
US4374710A1983-02-22
US4336113A1982-06-22
US4184932A1980-01-22
Other References:
See also references of EP 3678127A4
"Acoustic Absorbers and Diffusers", CRC PRESS, pages: 256
Attorney, Agent or Firm:
WATANABE Mochitoshi et al. (JP)
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