Sound absorbing device

Details Sound absorbing device Sound absorbing device

1978-03-22

1980-07-08

Hix, L. T.

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181252, 181258, 181296, F01N 124

Patent

active

042113032

ABSTRACT:
Acoustic energy is absorbed from a moving fluid by passing the fluid, which is typically a gas, through a liner comprising a closely woven textile-like material which serves as an acoustically transmitting inner lining. Anchored either directly or indirectly to the acoustically transmitting inner liner is a sound absorbing material the surface of which is covered with a multiplicity of fibers or filaments, each filament having one end attached directly or indirectly to the surface and its outer end free and contacting the inner wall of a casing in which the tube and sound absorbing material are contained. Automobile or marine mufflers or silencers effective in reducing or eliminating objectionable noise, but with only nominal back pressure, are disclosed.

REFERENCES:
patent: 1968456 (1934-07-01), Kliefoth
patent: 3243010 (1966-03-01), Flynn
patent: 3920872 (1975-11-01), Ollinger
patent: 3954031 (1976-05-01), Tull et al.
patent: 3955643 (1976-05-01), Clark

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