A note on the coupling mechanism of micro-perforated panel absorber

Cheng Yang, Li Cheng

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

Abstract

Extensive research was found in the literature regarding to the topic of Micro-perforated Panel Absorber (MPA). However, these works mainly focused on examining the performance of this device. As a result, the coupling mechanism of the MPA system is less highlighted. Conventionally, MPA was recognized as a local reactive sound absorption material, that its property is spatially independent over the panel surface. But in fact, a Micro-perforated Panel (MPP) with the backing cavity forms a coupling system and its absorption capability is determined by the coupling between the MPP and the backing cavity modes. Depending on the type of the cavity modes that dominate in the coupling, the MPA may be either local reactive or not. For the latter case, the horizontal modes dominate in the coupling and the non-local reactive property of the MPA varies with respect to the dimension of the MPP. This usually results local absorption performance variation, leading to global performance degradation. As a solution, it is suggested to use partitioned backing cavities so that the original non-local reactive absorption material becomes local reactive. If the partitioned backing cavities with different depths are used, it is possible to further enhance absorption performance of MPA.
Original languageEnglish
Title of host publication42nd International Congress and Exposition on Noise Control Engineering 2013, INTER-NOISE 2013
Subtitle of host publicationNoise Control for Quality of Life
PublisherOAL-Osterreichischer Arbeitsring fur Larmbekampfung
Pages3984-3990
Number of pages7
Volume5
ISBN (Print)9781632662675
Publication statusPublished - 1 Jan 2013
Event42nd International Congress and Exposition on Noise Control Engineering 2013: Noise Control for Quality of Life, INTER-NOISE 2013 - Innsbruck, Austria
Duration: 15 Sep 201318 Sep 2013

Conference

Conference42nd International Congress and Exposition on Noise Control Engineering 2013: Noise Control for Quality of Life, INTER-NOISE 2013
Country/TerritoryAustria
CityInnsbruck
Period15/09/1318/09/13

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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