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Patent Searching and Data


Title:
SOUNDPROOF MEMBER
Document Type and Number:
WIPO Patent Application WO/2021/065145
Kind Code:
A1
Abstract:
The present invention provides a soundproof member having an excellent soundproof property. This soundproof member comprises a first elastic porous body layer (10), a first film layer (12), a second elastic porous body layer (20), and a second film layer (22), which are disposed in order from a sound source (S) side. Each of the first elastic porous body layer (10) and the second elastic porous body layer (20) has a thickness of 0.5-10 mm, a bulk density of 45 kg/m3 to 550 kg/m3, and a Young's modulus of 7000-28000 Pa. The sum (L1/Λ1+L2/Λ2) of the ratio (L1/Λ1) of the thickness L1 (mm) to the viscous characteristic length Λ1 (μm) of the first elastic porous body layer (10) and the ratio (L2/Λ2) of the thickness L2 (mm) to the viscous characteristic length Λ2 (μm) of the second elastic porous body layer (20) is 0.11 or more.

Inventors:
MIKI TATSURO (JP)
KIKUCHI KAZUHIRO (JP)
SASAKAWA TETSUYA (JP)
FUJISAWA IKUMA (JP)
Application Number:
PCT/JP2020/027062
Publication Date:
April 08, 2021
Filing Date:
July 10, 2020
Export Citation:
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Assignee:
NICHIAS CORP (JP)
International Classes:
G10K11/16; G10K11/168
Attorney, Agent or Firm:
HARUKA PATENT & TRADEMARK ATTORNEYS (JP)
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