Sound Absorption of Locally Resonant Sonic Materials  

作　　者：赵宏刚 刘耀宗 温激鸿 郁殿龙 王刚 温熙森 

机构地区：[1]Institute of Mechatronical Engineering and the PBG Research Center, National University of Defense Technology Changsha 410073

出　　处：《Chinese Physics Letters》2006年第8期2132-2134,共3页中国物理快报（英文版）

摘　　要：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.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.

关 键 词：PHONONIC CRYSTALS SCATTERING 

分 类 号：O42[理学—声学] TB34[理学—物理]