NASA NTRS · 19740000261
Noise suppressor
Abstract
Suppressor reduces noise propagated through ducts. It provides high attenuation in given duct length. Entire device forms acoustic trap which utilizes reflective elements on ends to direct sound energy into sound-dissipating element in center. Device achieves large suppression by utilizing interactive effects of different suppression devices.
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Zorumski, W. E.. 1975-01-01. Noise suppressor. https://ntrs.nasa.gov/citations/19740000261
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