Transactions of the Korean Society for Noise and Vibration Engineering (한국소음진동공학회논문집)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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Wave Propagation Characteristics of Acoustic Metamaterials with Helmholtz Resonators

헬름홀츠 공명기들로 구성된 음향 메타물질의 파동전파 특성

  • Kwon, Byung-Jin (Division of Ocean System Engineering, School of Mechanical, Aerospace and System Engineering, Korea Advanced Institute of Science and Technology) ;
  • Jo, Choonghee (Division of Ocean System Engineering, School of Mechanical, Aerospace and System Engineering, Korea Advanced Institute of Science and Technology) ;
  • Park, Kwang-Chun (Division of Ocean System Engineering, School of Mechanical, Aerospace and System Engineering, Korea Advanced Institute of Science and Technology) ;
  • Oh, Il-Kwon (Division of Ocean System Engineering, School of Mechanical, Aerospace and System Engineering, Korea Advanced Institute of Science and Technology)
  • Received : 2012.10.23
  • Accepted : 2013.01.24
  • Published : 2013.02.20
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Abstract

The wave propagation characteristics of an acoustic metamaterial composed of periodically repeated one-dimensional Helmholtz resonator array was investigated considering the effects of dimensional changes of the resonator geometry on the transmission coefficient and band gap. The effective impedance and transmission coefficient of the acoustic metamaterials are obtained based on the acoustic transmission line method. The designed acoustic metamaterials exhibit band gaps and negative bulk modulus that are non-existent properties in the nature. The band gap of the acoustic metamaterial is strongly dependent on the geometry parameters of Helmholtz resonators and lattice spacing. Also, a new type of metamaterial that is periodically constructed with two different resonators was designed to open the local resonance band gap without change of Bragg scattering.

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References

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