Soundproof member

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 12087262
APP PUB NO 20220383845A1
SERIAL NO

17762166

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A soundproof member includes: a first elastic porous body layer; a first film layer; a second elastic porous body layer; and a second film layer, the layers arranged in the stated order from a sound source (S) side, wherein the first and second elastic porous body layer each have: a thickness of 0.5 mm or more and 10 mm or less; a bulk density of 45 kg/m3 or more and 550 kg/m3 or less; and a Young's modulus of 7,000 Pa or more and 28,000 Pa or less, and wherein a total (L1/Λ1+L2/Λ2) of a ratio (L1/Λ1) of the thickness L1 (mm) of the first elastic porous body layer to a viscous characteristic length Λ1 (μm) thereof and a ratio (L2/Λ2) of the thickness L2 (mm) of the second elastic porous body layer (20) to a viscous characteristic length Λ2 (μm) thereof is 0.11 or more.

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Patent Owner(s)

Patent OwnerAddress
NICHIAS CORPORATIONTOKYO

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fujisawa, Ikuma Tokyo, JP 1 0
Kikuchi, Kazuhiro Tokyo, JP 26 193
Miki, Tatsuro Tokyo, JP 6 9
Sasakawa, Tetsuya Tokyo, JP 55 139

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