Low-frequency waterborne sound insulation by an acoustic metascreen with a metal chiral structure

Chao Wang; Chao Wang; Honggang Zhao; Honggang Zhao; Yang Wang; Yang Wang; Jie Zhong; Jie Zhong; Haibin Yang; Haibin Yang; Dianlong Yu; Dianlong Yu; Jihong Wen; Jihong Wen

doi:10.3389/fmats.2022.1015839

Frontiers in Materials (Sep 2022)

Low-frequency waterborne sound insulation by an acoustic metascreen with a metal chiral structure

Chao Wang,
Chao Wang,
Honggang Zhao,
Honggang Zhao,
Yang Wang,
Yang Wang,
Jie Zhong,
Jie Zhong,
Haibin Yang,
Haibin Yang,
Dianlong Yu,
Dianlong Yu,
Jihong Wen,
Jihong Wen

Affiliations

Chao Wang: College of Intelligence Science and Technology, National University of Defense Technology, Changsha, China
Chao Wang: Laboratory of Science and Technology on Integrated Logistics Support, National University of Defense Technology, Changsha, China
Honggang Zhao: College of Intelligence Science and Technology, National University of Defense Technology, Changsha, China
Honggang Zhao: Laboratory of Science and Technology on Integrated Logistics Support, National University of Defense Technology, Changsha, China
Yang Wang: College of Intelligence Science and Technology, National University of Defense Technology, Changsha, China
Yang Wang: Laboratory of Science and Technology on Integrated Logistics Support, National University of Defense Technology, Changsha, China
Jie Zhong: College of Intelligence Science and Technology, National University of Defense Technology, Changsha, China
Jie Zhong: Laboratory of Science and Technology on Integrated Logistics Support, National University of Defense Technology, Changsha, China
Haibin Yang: College of Intelligence Science and Technology, National University of Defense Technology, Changsha, China
Haibin Yang: Laboratory of Science and Technology on Integrated Logistics Support, National University of Defense Technology, Changsha, China
Dianlong Yu: College of Intelligence Science and Technology, National University of Defense Technology, Changsha, China
Dianlong Yu: Laboratory of Science and Technology on Integrated Logistics Support, National University of Defense Technology, Changsha, China
Jihong Wen: College of Intelligence Science and Technology, National University of Defense Technology, Changsha, China
Jihong Wen: Laboratory of Science and Technology on Integrated Logistics Support, National University of Defense Technology, Changsha, China

DOI: https://doi.org/10.3389/fmats.2022.1015839
Journal volume & issue: Vol. 9

Abstract

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Low sound speed or low-density materials can be used as soft acoustic boundaries in water, potentially as low-frequency underwater sound insulation. This study uses a chiral structure to construct an acoustic metascreen with deep subwavelength thickness. The results show that the transmission coefficient of the metascreen decreases noticeably in the low-frequency range when adjusting the chiral structure. The displacement pattern and the effective acoustic impedance are used to investigate the sound insulation mechanism. Low sound speed and effective acoustic impedance are found in the anisotropic chiral structure, and an extensive range of quasi-longitudinal wave phase velocities from 116.70 m/s to 3935.48 m/s can be obtained by adjusting the structural parameters without changing the filling rate. Finally, the effect of the oblique incidence angle on the sound insulation of the metascreen is investigated.

Published in Frontiers in Materials

ISSN: 2296-8016 (Online)
Publisher: Frontiers Media S.A.
Country of publisher: Switzerland
LCC subjects: Technology
Website: https://www.frontiersin.org/journals/materials

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