Noise damper

Details Noise damper Noise damper

1995-04-10

1996-12-24

Dang, Khanh

Acoustics

Sound-modifying means

Space absorbers

181286, 181293, E04B 182

Patent

active

055875645

ABSTRACT:
A noise damper comprising a molded part of polymer material having at least two chambers which are designed as resonators with resonant frequencies that differ from one another. The molded part consists of a closed-cell material. The resonators are formed of essentially cup-shaped protrusions that open toward the sound source, the molded part on the side facing the sound source being covered by an orifice plate comprising at least two openings leading into each chamber. The molded part and the orifice plate are detachably joined together.

REFERENCES:
patent: 2124463 (1938-07-01), Cunnington
patent: 2887173 (1959-05-01), Boschi
patent: 3269484 (1966-08-01), Lighter
patent: 4149612 (1979-04-01), Baschorr
patent: 4242398 (1980-12-01), Segawa et al.
patent: 4425981 (1984-11-01), Kiesewetter et al.
patent: 4584232 (1986-04-01), Frank et al.
patent: 4821841 (1989-04-01), Woodward et al.
patent: 5024290 (1991-06-01), Birker

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