Method and apparatus for noise reduction

Details Method and apparatus for noise reduction Method and apparatus for noise reduction

1985-03-06

1986-04-15

Fuller, Benjamin R.

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181296, 98DIG10, E04F 1704

Patent

active

045821640

ABSTRACT:
Sound transmission from an equipment room via the air conditioning ductwork must be reduced so as to permit the full use of adjacent areas. The ductwork located within the equipment room is made of a lighter gauge material to facilitate radiation of sound back into the equipment room. The flow is divided into a plurality of duct passages within the duct to achieve sufficient attenuation. Each of the duct passages is lined on all sides so that there is a double thickness of acoustic insulation between adjacent duct passages.

REFERENCES:
patent: 4236597 (1980-12-01), Kiss et al.
patent: 4319521 (1982-03-01), Gorchev et al.
patent: 4432434 (1984-02-01), Dean, Jr.

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