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

042113040

ABSTRACT:
Acoustic energy is absorbed from a moving fluid by passing the fluid, which is typically a gas, over a surface covered with a multiplicity of loops of fibers or filaments, each loop having one portion thereof fixed to a suitable backing material, the backing material attached directly or indirectly to a conduit or the like and the other free portions extending into the moving fluid stream. Automobile mufflers or silencers effective in reducing or eliminating objectionable noise, but with at most only nominal back pressure, are disclosed.

REFERENCES:
patent: 2073951 (1937-03-01), Servais
patent: 3920872 (1975-11-01), Ollinger
patent: 3954031 (1976-05-01), Tull et al.

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