Rotating self-cleaning sound absorber for ducts

Details Rotating self-cleaning sound absorber for ducts Rotating self-cleaning sound absorber for ducts

1978-06-06

1980-12-02

Miller, Jr., George H.

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181276, 181277, 181224, 55400, F01N 102, F01N 118, F01N 302

Patent

active

042365988

ABSTRACT:
A sound absorbing structure for a flow duct composed of a bundle of parallel, terminated, acoustical waveguides. The bundle of waveguides is cut obliquely so that the individual waveguides vary substantially in length along the cut. The bundle is arranged within a structure which is revolvable about its longitudinal axis. The exterior surface of the structure is spaced from the interior wall of the duct. The longitudinal axis of each of the waveguides is located substantially perpendicular to the axis of revolution. The structure revolves during passage of gas through the duct.

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patent: 4137992 (1979-02-01), Herman

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