Micro-perforated panel absorber in small-scale cavity

Cheng Yang, Li Cheng

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

Micro-perforated Panel (MPP) with a backing air gap has been widely used in various noise control applications. Treated as a type of sound absorption material, its acoustic property is usually described in terms of the locally reactive acoustic impedance under normal plane wave incidence assumption. A Micro-perforated Panel Absorber (MPPA) consists of a MPP and a backing air cavity of a finite volume. When integrated to a complex vibro-acoustic environment such as an enclosure, its acoustic behavior will be strongly affected by the surrounding acoustic media to which it is coupled. This paper presents a theoretical tool to investigate this problem. It is shown that the MPPA has to be modeled as part of the system. Analysis shows that the sound absorption efficiency of the MPPA depends on the modal coupling between the enclosure and the MPPA backing cavity, the consideration of which is necessary for accurately predicting the sound field of the enclosure. Experiments are carried out to support the findings.
Original languageEnglish
Title of host publication21st International Congress on Sound and Vibration 2014, ICSV 2014
PublisherInternational Institute of Acoustics and Vibrations
Pages802-809
Number of pages8
Volume1
ISBN (Electronic)9781634392389
Publication statusPublished - 1 Jan 2014
Event21st International Congress on Sound and Vibration 2014, ICSV 2014 - Beijing, China
Duration: 13 Jul 201417 Jul 2014

Conference

Conference21st International Congress on Sound and Vibration 2014, ICSV 2014
CountryChina
CityBeijing
Period13/07/1417/07/14

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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