Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/30510
Title: Performance of multiple micro-perforated panels in a duct
Authors: Liu, Y 
Choy, YS 
Chiang, YK
Keywords: Multiple panel
Sound reflection
Transmission loss
Issue Date: 2014
Publisher: Australian Acoustical Society
Source: INTERNOISE 2014 - 43rd International Congress on Noise Control Engineering: Improving the World Through Noise Control, 2014 How to cite?
Abstract: Generalized formulation is developed analytically to calculate the transmission loss performance of a silencer by using multiple micro-perforate panel (MPP) array silencers in ventilation duct system. The device, based on single MPP design, consists of different expansion chambers with the side-branch cavities covered by micro-perforate panels of different properties. The theoretical model can also be simplified to evaluate the performance for normal plate silencer. With a preliminary result of two normal plates, it shows that the plate silencer can offer a wide stop band of 3.5 from low to medium frequency range when the length ratio is 1 to 4. Compared with same total length of a single plate, the stop band is improved by 25%. For the MPP silencer under similar condition, the stop band is also increased by 16%. Apart from the considerate increment of stop band, the bending stiffness requirement is also released by 35% and 40% respectively.
Description: 43rd International Congress on Noise Control Engineering: Improving the World Through Noise Control, INTERNOISE 2014, Melbourne, 16-19 November 2014
URI: http://hdl.handle.net/10397/30510
ISBN: 9780909882037
Appears in Collections:Conference Paper

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