Microperforated panel absorber design: A tutorial

D. W. Herrin, X. Hua, J. Liu

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Scopus citations

Abstract

A microperforated panel absorber is best thought of as a noise control system consisting of both the panel itself and the air space behind the panel. This work looks at practical design aspects related to both the panel and the air space. The work by Maa for determining the transfer impedance of the panel is relied on heavily, and it is shown that his equations are useful for characterizing microperforated panels consisting of slit type perforations and for non-uniform hole diameters. Because panels are often placed in dirty environments, the effect of contamination is discussed and it is noteworthy that performance of a panel can sometimes be improved when polluted. The second part of this paper will focus on the design of backings behind the panel. It has been shown that both partitioning and varying the backing cavity depth can greatly improve microperforated panel performance. A number of schemes that Wirt suggested over 30 years ago are used to enhance both the low and broadband frequency sound absorption.

Original languageEnglish
Title of host publication21st International Congress on Sound and Vibration 2014, ICSV 2014
Pages2529-2536
Number of pages8
ISBN (Electronic)9781634392389
StatePublished - 2014
Event21st International Congress on Sound and Vibration 2014, ICSV 2014 - Beijing, China
Duration: Jul 13 2014Jul 17 2014

Publication series

Name21st International Congress on Sound and Vibration 2014, ICSV 2014
Volume3

Conference

Conference21st International Congress on Sound and Vibration 2014, ICSV 2014
Country/TerritoryChina
CityBeijing
Period7/13/147/17/14

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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