Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/32040
Title: Sound attenuation using duct silencers with micro-perforated panel absorbers
Authors: Yu, X
Cheng, L 
Tong, Y
Pan, J
Keywords: Micro-perforated panel
Silencer
Issue Date: 2014
Publisher: Australian Acoustical Society
Source: INTERNOISE 2014 - 43rd International Congress on Noise Control Engineering: Improving the World Through Noise Control, 2014 (CD-ROM) How to cite?
Abstract: Micro-perforated panel (MPP) can be used as non-fibrous acoustic absorber which can provide broadband sound absorption performance. In this study, a sub-structuring methodology based on the Patch Transfer Function (PTF) approach to deal with duct silencers with MPP absorbers and internal partitions is proposed, and the sound attenuation performance of such silencers is investigated. Reactive silencers with only internal partitions are shown to exhibit strong resonant pattern, with each sub-divided chamber acting as acoustic resonators for strong sound reflection. On the other hand, hybrid silencers which combine the reactive effect of partitions and dissipative effect of MPP absorbers are studied. Simulation results show that MPP parameters such as hole diameters have strong influence on the silencing performance. Although the hole diameter of MPP is typically very small (less than 1mm), the reactive effect of MPP silencer is still obvious. The calculation accuracy of the proposed formulation is validated against finite element method (FEM) analysis.
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/10397/32040
Appears in Collections:Conference Paper

Show full item record

Page view(s)

66
Last Week
0
Last month
Checked on Jul 16, 2017

Google ScholarTM

Check



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.