Modeling and analysis of a planar source based flexible micro-perforated panel absorption structure

Yang Liu, Kean Chen, Jian Xu, Xiyue Ma

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

Abstract

In order to enhance the low frequency sound absorption performance and the applicability of the traditional micro-perforated absorbers under complicated noise environments, a composite sound absorption structure consisting of a front flexible micro-perforated panel (MPP), an air cavity and a back planar loudspeaker (PL) is proposed. In addition to the mid and high frequency sound absorption properties of the MPP, with a properly optimized exciting force on the planar loudspeaker, the composite absorber has the ability to absorb low frequency sound. The planar loudspeaker is treated as a plate driven by a controllable point force. The theoretic analytical model is set up by the modal expansion and vibro-acoustic coupling method. Then a Finite Element (FE)based acoustic simulation model of the proposed structure is established. Theoretical analysis and numerical simulations are carried out to validate the proposed model.

Original languageEnglish
Title of host publication25th International Congress on Sound and Vibration 2018, ICSV 2018
Subtitle of host publicationHiroshima Calling
PublisherInternational Institute of Acoustics and Vibration, IIAV
Pages578-584
Number of pages7
ISBN (Electronic)9781510868458
StatePublished - 2018
Event25th International Congress on Sound and Vibration 2018: Hiroshima Calling, ICSV 2018 - Hiroshima, Japan
Duration: 8 Jul 201812 Jul 2018

Publication series

Name25th International Congress on Sound and Vibration 2018, ICSV 2018: Hiroshima Calling
Volume1

Conference

Conference25th International Congress on Sound and Vibration 2018: Hiroshima Calling, ICSV 2018
Country/TerritoryJapan
CityHiroshima
Period8/07/1812/07/18

Keywords

  • Active structure
  • FEM
  • Hybrid absorber
  • MPP
  • Planar loudspeaker

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