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Three-Dimensional Soundproof Acoustic Metacage.
Liu, Chenkai; Shi, Jinjie; Zhao, Wei; Zhou, Xiaoxi; Ma, Chu; Peng, Ruwen; Wang, Mu; Hang, Zhi Hong; Liu, Xiaozhou; Christensen, Johan; Fang, Nicholas X; Lai, Yun.
Afiliação
  • Liu C; MOE Key Laboratory of Modern Acoustics, National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China.
  • Shi J; School of Physical Science and Technology, Soochow University, Suzhou 215006, China.
  • Zhao W; MOE Key Laboratory of Modern Acoustics, National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China.
  • Zhou X; School of Physical Science and Technology, Soochow University, Suzhou 215006, China.
  • Ma C; School of Electronic and Information Engineering, Soochow University, Suzhou 215006, China.
  • Peng R; School of Physical Science and Technology, Soochow University, Suzhou 215006, China.
  • Wang M; Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
  • Hang ZH; Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA.
  • Liu X; MOE Key Laboratory of Modern Acoustics, National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China.
  • Christensen J; MOE Key Laboratory of Modern Acoustics, National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China.
  • Fang NX; School of Physical Science and Technology, Soochow University, Suzhou 215006, China.
  • Lai Y; Institute for Advanced Study, Soochow University, Suzhou 215006, China.
Phys Rev Lett ; 127(8): 084301, 2021 Aug 20.
Article em En | MEDLINE | ID: mdl-34477409
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.
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2021 Tipo de documento: Article País de afiliação: China
Texto completo
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2021 Tipo de documento: Article País de afiliação: China