Reduction of sound in a low velocity flo
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B. Sommersel; U.R. Kristiansen
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Article
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1976
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Elsevier Science
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English
β 324 KB
This paper presents the results of some experiments on the use of structures of aerodynamically-shaped elements as narrow-band sound reflectors in a duct. The structures are tuned to give maximum attenuation for frequencies determined by the Bragg reflection condition, and are thought to be of speci