Sound-absorbing device, especially for damping of noises expandi

Details Sound-absorbing device, especially for damping of noises expandi Sound-absorbing device, especially for damping of noises expandi

1978-04-07

1980-12-02

Wintercorn, Richard A.

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181252, 181256, 181264, F04F 1704, F01N 124

Patent

active

042365970

ABSTRACT:
A flow duct for the delivery of air for ventilation is of round cross section and is surrounded by a prismatic casing over the length of the duct. Sound-absorbing material is filled into the space between the casing and the duct and varies in radial thickness around the periphery of the duct as measured in a plane perpendicular to the axis thereof.

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