An investigation on the optimization of air layers and porous elastic materials for sound in-sulation of composite structure

Guofeng Bai, Pei Zhan, Fusheng Sui, Jun Yang

Research output: Contribution to conferencePaperpeer-review

Abstract

Based on the Biot theory of sound propagation in multi-layer materials, the method of transfer matrix were used to derive the transmission loss of typical layered-structure consists of elastic solid, fluid and porous material. The influence of air layer and porous material on sound insula-tion performance of multi-layer structure have been discussed by numerical calculation. The sound insulation performance of the composite structure has been optimized in the specific fre-quency band by using genetic algorithm and transfer matrix. The results indicate that the air layer and porous materials can improve the sound insulation performance of the composite structure. The distribution of the air layer and porous materials also has great influence on the sound insulation performance.

Original languageEnglish
Publication statusPublished - 2017
Externally publishedYes
Event24th International Congress on Sound and Vibration, ICSV 2017 - London, United Kingdom
Duration: Jul 23 2017Jul 27 2017

Conference

Conference24th International Congress on Sound and Vibration, ICSV 2017
Country/TerritoryUnited Kingdom
CityLondon
Period7/23/177/27/17

ASJC Scopus Subject Areas

  • Acoustics and Ultrasonics

Keywords

  • Air layers
  • Parameter optimization
  • Porous material
  • Sound transmission loss

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