Sound attenuator

Details Sound attenuator Sound attenuator

1986-10-02

1987-05-26

Fuller, Benjamin R.

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181243, 181252, F01N 112

Patent

active

046677704

ABSTRACT:
A sound attenuator for use in a rigid walled duct through which gas is to flow which comprises a cylindrical hollow shell within which is mounted a helical, sound absorbing, vane assembly. The interior of the wall of the shell is formed of a metallic wire screening. The shell itself is formed of a soft fiberglass mat for sound absorbing purposes. A similar fiberglass mat is included within each vane. Also, each vane includes a layer of lead.

REFERENCES:
patent: 3235003 (1966-02-01), Smith
patent: 3696883 (1972-10-01), DeVane
patent: 4421202 (1983-12-01), Hoy

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