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http://dx.doi.org/10.5050/KSNVE.2013.23.2.167

Wave Propagation Characteristics of Acoustic Metamaterials with Helmholtz Resonators  

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)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.23, no.2, 2013 , pp. 167-175 More about this Journal
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.
Keywords
Acoustic Metamaterials; Acoustic Transmission Line Method; Helmholtz Resonator; Effective Impedance; Dispersion Relation;
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Times Cited By KSCI : 1  (Citation Analysis)
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