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Title: Methods for designing a chamber to reduce noise in a duct
Authors: Huang, L
Choy, YS 
Keywords: Low-frequency duct noise
Duct noise reducion
Issue Date: 17-Jan-2006
Source: US Patent 6,988,057 B2. Washington, DC: US Patent and Trademark Office, 2006. How to cite?
Abstract: Low-frequency duct noise is relatively difficult to deal with by passive methods such as porous duct lining. Reactive methods like expansion chamber are rather bulky, while compact resonators are to narrow-banded. This invention shows that a suitably stetched thin membrane backed by a slender cavity can achieve a satisfactory performance from low to medium frequencies over an octave band.
Rights: Assignee: The Hong Kong Polytechnic University.
Appears in Collections:Patent

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