Metasurface by multiple perforated panels in a coiled arrangement

Zhibo Wang, Weiping Yang, Yat Sze Choy

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

Abstract

This study presents a hybrid acoustic metasurface by multiple perforated panels in a coiled arrangement, which exhibits superior broadband low-frequency sound absorption and rich tunability. The perforations were introduced on both the facesheet and coiled-up channels. The introduction of perforated holes into the channels not only can increase the acoustic dissipation, but also further compensate the acoustic reactance of the facesheet. A theoretical framework was set up to explain the inherent sound absorbing mechanism. Results show that the near perfect absorption frequency was dramatically reduced in comparison with the absorber without the inside perforations. A parametric study was subsequently carried out and confirmed the strong tunability of near-perfect sound absorption and relative absorption bandwidth. Experiments using an impedance tube were finally implemented and validated the theoretical findings. Superior absorption as well as deep-subwavelength thickness of this new hybrid acoustic metasurface paves the way in noise control engineering.

Original languageEnglish
Title of host publicationProceedings of 2020 International Congress on Noise Control Engineering, INTER-NOISE 2020
EditorsJin Yong Jeon
PublisherKorean Society of Noise and Vibration Engineering
ISBN (Electronic)9788994021362
Publication statusPublished - 23 Aug 2020
Event49th International Congress and Exposition on Noise Control Engineering, INTER-NOISE 2020 - Seoul, Korea, Republic of
Duration: 23 Aug 202026 Aug 2020

Publication series

NameProceedings of 2020 International Congress on Noise Control Engineering, INTER-NOISE 2020

Conference

Conference49th International Congress and Exposition on Noise Control Engineering, INTER-NOISE 2020
Country/TerritoryKorea, Republic of
CitySeoul
Period23/08/2026/08/20

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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