Acoustic space absorber unit

Details Acoustic space absorber unit Acoustic space absorber unit

1980-02-04

1982-03-16

Hix, L. T.

Acoustics

Sound-modifying means

Space absorbers

181286, E04B 182

Patent

active

043196616

ABSTRACT:
An acoustic space absorber unit is provided in which Helmholtz resonators are mounted within an enclosure composed of sound absorbing material, with the orifices of the resonators near to but spaced from the enclosing material. The Helmholtz resonators are tuned to low audible frequencies such as 125 Hz. The Helmholtz resonators enhance the sound absorption at low frequencies while the entire unit provides sound absorption throughout the entire audible range.

REFERENCES:
patent: 1554179 (1925-09-01), Trader
patent: 2502020 (1950-03-01), Olson
patent: 2840179 (1958-06-01), Junger
patent: 3095943 (1963-07-01), Kemp
patent: 3229785 (1966-01-01), Pottash
patent: 3769767 (1973-11-01), Scott
patent: 3819007 (1974-06-01), Wirk et al.
patent: 3910374 (1975-10-01), Holehouse
patent: 4084366 (1978-04-01), Saylor et al.
patent: 4174020 (1979-11-01), Challis

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