Sound absorber

Details Sound absorber Sound absorber

1994-06-14

1996-04-30

Dang, Khanh

Acoustics

Sound-modifying means

Space absorbers

181286, 181290, 52144, 52145, E04B 182

Patent

active

055127150

ABSTRACT:
A sound absorber arrangement includes a plurality of sound absorbing layers of porous materials such as glass wool, rock fiber or cellular plastic, and high-polymer films, are alternately laminated in a direction perpendicular to a sound incidence plane. The layer thicknesses are increased in order in a direction away from the sound incidence plane. The sound absorber arrangement makes it possible to make a sound absorbing coefficient constant over the low to high frequency sound range.

REFERENCES:
patent: 2923372 (1960-02-01), Maccaferri
patent: 3819007 (1974-06-01), Wirt et al.
patent: 4106587 (1978-08-01), Nash et al.
patent: 4170674 (1979-10-01), Matsuki
patent: 4607466 (1986-08-01), Allred
patent: 5004070 (1991-04-01), Wang

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