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Sound Absorption of Locally Resonant Sonic Materials |
| ZHAO Hong-Gang;LIU Yao-Zong;WEN Ji-Hong;YU Dian-Long;WANG Gang;WEN Xi-Sen |
| Institute of Mechatronical Engineering and the PBG Research Center, National University of Defense Technology, Changsha 410073 |
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| Cite this article: |
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ZHAO Hong-Gang, LIU Yao-Zong, WEN Ji-Hong et al 2006 Chin. Phys. Lett. 23 2132-2134 |
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Abstract The acoustic properties of locally resonant sonic materials with viscosity are theoretically investigated by using the multiple-scattering approach. We find that the absorption of a two-layer slab dominates the wave attenuation in the resonant frequency region under the condition of moderate or high viscous level. The fundamental mechanism operating in local resonance for absorption is investigated for the viability by the mode translation in the scattering process of a single scatterer. Finally the absorption performance in a multi-layer system is discussed.
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| Keywords:
43.20.+g
43.30.+m
62.30.+d
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Published: 01 August 2006
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| PACS: |
43.20.+g
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(General linear acoustics)
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43.30.+m
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(Underwater sound)
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62.30.+d
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(Mechanical and elastic waves; vibrations)
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