Reactive acoustic silencer

Details Reactive acoustic silencer Reactive acoustic silencer

1996-12-04

1999-02-09

Dang, Khanh

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181250, E04F 1704

Patent

active

058697926

ABSTRACT:
An acoustic duct silencer is disclosed having opposed sidewall baffles which are disposed in a duct such that a cavity is defined between the baffles and the adjacent duct sidewalls, the space between the baffles bordering a passageway in the duct for the flow of a fluid medium therethrough. Each baffle features an array of generally parallel, spaced-apart elongate slots which substantially span the vertical or horizontal breadth of the baffles. The baffles preferably have a relatively large effective thickness so that the slots formed therein have a significant depth to them. In this manner, an integral array of resonators are provided having a significant slot or throat depth for the attenuation of low frequency sound.

REFERENCES:
patent: 4100993 (1978-07-01), Feder
patent: 4150732 (1979-04-01), Hoch et al.
patent: 4287962 (1981-09-01), Ingard et al.
patent: 5276291 (1994-01-01), Norris

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