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

Siu Kit Lau, Zhenbo Lu, Yiyuan Liu, Xiang Yu, Mohamad Zuraimi Bin Endot, Boo Cheong Khoo

Research output: Unpublished conference presentation (presented paper, abstract, poster)Conference presentation (not published in journal/proceeding/book)Academic researchpeer-review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) are lightweight and compact materials with periodic structure. These materials reveal dramatically better sound insulation at low frequencies than the conventional systems of similar dimensions and weight. It promises for the applications of lightweight construction and vehicular cabin to screen sound at a particular frequency band. Existing studies by the authors and other researchers showed that the MAMs with optimized mass distributions could improve the performance of sound insulation. In the present paper, MAMs with eccentric masses are designed and fabricated, and these prototypes are used for experimentally investigating their acoustic performance. Results agree with the numerical results, and they show that the MAMs with optimized eccentric masses' distribution can significantly broaden the frequency range of sound insulation in the low-frequency range.

Original languageEnglish
Publication statusPublished - 2017
Externally publishedYes
Event46th International Congress and Exposition on Noise Control Engineering: Taming Noise and Moving Quiet, INTER-NOISE 2017 - Hong Kong, China
Duration: 27 Aug 201730 Aug 2017

Conference

Conference46th International Congress and Exposition on Noise Control Engineering: Taming Noise and Moving Quiet, INTER-NOISE 2017
Country/TerritoryChina
CityHong Kong
Period27/08/1730/08/17

Keywords

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

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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