Acoustic absorber, and method of manufacture thereof

Details Acoustic absorber, and method of manufacture thereof Acoustic absorber, and method of manufacture thereof

1990-07-26

1992-08-11

Adams, Russell E.

Acoustics

Sound-modifying means

Space absorbers

181286, E04B 182

Patent

active

051371111

ABSTRACT:
A sound absorber has a column shape defined by a hollow, substantially cylindrical wire frame with a filler of uniformly distributed fused parallel filaments having high surface area to mass ratio, such as bloomed cellulose acetate. The sound absorber gives efficient absorption in the articulation frequency range.
A method of manufacture of the sound absorber includes determining the sound response of an acoustic environment, determining the reciprocal of the sound response of that environment, and matching the absorption characteristics of the sound absorber to the reciprocal of the sound response.
Each sound absorber has a linear absorption spectrum above the center frequency so that clusters of the sound absorbers exhibit a similar spectrum.

REFERENCES:
patent: 2160638 (1937-08-01), Bedell et al.
patent: 2502020 (1950-03-01), Olson
patent: 4319661 (1982-03-01), Proudfoot
patent: 4548292 (1985-10-01), Noxon

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