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RESEARCH PAPERS

On the “In-Situ” Control of Acoustic Liner Attenuation

[+] Author and Article Information
P. D. Dean

Lockheed-Georgia Co., Marietta, Ga.

J. Eng. Power 99(1), 63-70 (Jan 01, 1977) (8 pages) doi:10.1115/1.3446253 History: Received January 08, 1976; Online July 14, 2010

Abstract

In this paper a concept is presented which enables the attenuation of sound in a lined duct to be controlled via the control of the fundamental liner characteristic (the acoustic impedance). The concept is described and modeled by a semiempirical analysis. The feasibility is demonstrated by means of measurements of attenuation and local impedance in a small scale flow duct test facility.

Copyright © 1977 by ASME
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