Title:
LAMINATE SOUND ABSORBING BODY
Document Type and Number:
Japanese Patent JP2023125627
Kind Code:
A
Abstract:
To obtain a laminate sound absorbing body which is thinner and has especially high sound absorbency in a low-frequency band.SOLUTION: A laminate sound absorbing body containing an A layer constituting an outermost layer of one of surfaces of the laminate sound absorbing body, a C layer constituting an outermost layer of the other of the surfaces, and a B layer being a porous layer provided inside, each of the A layer and the C layer being a resin foam layer, a surface in contact with the B layer being smooth, a sound absorption coefficient of a sound at 300 Hz of the laminate sound absorbing body being more than or equal to 0.50, and a minimum sound absorption coefficient of a sound in a range of 1,000 Hz to 5,000 Hz being more than or equal to 0.60.SELECTED DRAWING: Figure 1
Inventors:
SHINKAWA MASASHI
GOTO TAKAHIRO
TAMIYA TOMOYUKI
GOTO TAKAHIRO
TAMIYA TOMOYUKI
Application Number:
JP2022029838A
Publication Date:
September 07, 2023
Filing Date:
February 28, 2022
Export Citation:
Assignee:
CCI HOLDINGS CO LTD
International Classes:
G10K11/16; B32B5/24; G10K11/168
Attorney, Agent or Firm:
Yasuyuki Yamada
Masahiro Nakamura
Masahiro Nakamura