Three-Dimensional Soundproof Acoustic Metacage
Name
PhysRevLett.127.084301.pdf
Description
Published version
Size
1.67 MB
Format
Adobe PDF
Checksum (MD5)
f7ba50e8c88dce66ba335fc941f0f4d0
Author(s)
Liu, Chenkai
Shi, Jinjie
Zhao, Wei
Zhou, Xiaoxi
Ma, Chu
Peng, Ruwen
Wang, Mu
Hang, Zhi Hong
Liu, Xiaozhou
Christensen, Johan
Date Issued
2021
Journal
Physical Review Letters
Publisher
American Physical Society (APS)
Citation
Liu, Chenkai, Shi, Jinjie, Zhao, Wei, Zhou, Xiaoxi, Ma, Chu et al. 2021. "Three-Dimensional Soundproof Acoustic Metacage." Physical Review Letters, 127 (8).
Version
Final published version
Abstract
In this Letter, we theoretically propose and experimentally demonstrate a three-dimensional soundproof acoustic cage structure, hereby denoted as an acoustic metacage. The metacage is composed of six acoustic metamaterial slabs with open holes and hidden bypass space coiling tunnels connected to the holes. Band structure analysis reveals a novel physical mechanism to open a low-frequency broad partial band gap via the band folding in other directions, which can also be interpreted by an effective medium with indefinite effective mass density and negative effective modulus. Transmission loss in simulations and in the acoustic impedance tube are administered. Strikingly, we prove that the soundproofing effect of the metacage is robust against the airflow perturbation induced by a fan. Our work paves a road for low-frequency airborne soundproof structures in the presence of ventilation.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Terms of Use
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Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PHYSREVLETT.127.084301
