Numerical investigations of membrane-type acoustic metamaterials with eccentric masses for broadband sound isolation

Siu Kit Lau, Zhenbo Lu, Kah Hsien Lim, Yiyuan Liu, Boo Cheong Khoo, Xiang Yu

Research output: Unpublished conference presentation (presented paper, abstract, poster)Conference presentation (not published in journal/proceeding/book)Academic researchpeer-review

1 Citation (Scopus)

Abstract

Membrane-type acoustic metamaterials (MAMs) which are novel, lightweight and compact materials can be used to screen sound at a particular frequency band. Thus, it opens many possibilities toward producing a new generation of acoustic materials and sensor devices. In the present paper, an efficient scheme of finite element modelling for the acoustic-structural interaction of MAMs with eccentric masses is developed, and this model is used to optimize the eccentric masses' distributions (such as thicknesses, weights, shapes, separations and locations of the masses) for improving acoustic performance. Results show that the optimized eccentric masses' distribution can significantly broaden the frequency range of sound insulation. Furthermore, the membrane-acoustic interactions are explored for better understanding the physical mechanism.

Original languageEnglish
Publication statusPublished - 2017
Externally publishedYes
Event24th International Congress on Sound and Vibration, ICSV 2017 - London, United Kingdom
Duration: 23 Jul 201727 Jul 2017

Conference

Conference24th International Congress on Sound and Vibration, ICSV 2017
Country/TerritoryUnited Kingdom
CityLondon
Period23/07/1727/07/17

Keywords

  • Building acoustics
  • Eccentric masses
  • Finite element modelling
  • Membrane-type acoustic metamaterials (MAMs)
  • Sound insulation

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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