Sound absorptive material

Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Including a second component containing structurally defined...

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Details

428161, 428172, 428323, 428338, 181290, 181284, B32B 900

Patent

active

053044150

ABSTRACT:
A sound absorptive material has powder particles having a sound absorption characteristics at a low frequency and generally supported in a vibratable state by a porous support, whereby the sound absorptive material can be increased in the sound absorption coefficient in the low frequency range while maintaining the absorptive material to be thin.

REFERENCES:
patent: 4113053 (1978-09-01), Matsumoto et al.
patent: 4386676 (1983-06-01), Gadde et al.
patent: 5164260 (1992-11-01), Yoshinaka et al.

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