Controls of pass-bands in asymmetric acoustic transmission  

作　　者：孙宏祥 张淑仪 袁寿其 

机构地区：[1]Laboratory of Modern Acoustics,Institute of Acoustics,Collaborative Innovation Center of Advanced Microstructures,Nanjing University [2]Research Center of Fluid Machinery Engineering and Technology,Jiangsu University [3]State Key Laboratory of Acoustics,Institute of Acoustics,Chinese Academy of Sciences

出　　处：《Chinese Physics B》2016年第12期92-97,共6页中国物理B（英文版）

基　　金：Project supported by the National Basic Research Program of China(Grant No.2012CB921504);the Major Program of the National Natural Science Foundation of China(Grant No.51239005);the National Natural Science Foundation of China(Grant Nos.11174142 and 11404147);the Natural Science Foundation of Jiangsu Province,China(Grant No.BK20140519);the China Postdoctoral Science Foundation(Grant No.2015M571672);the Training Project of Young Backbone Teachers of Jiangsu University,China;the Research Fund for Advanced Talents of Jiangsu University,China(Grant No.13JDG106)

摘　　要：The controls of the pass-bands in an asymmetric acoustic transmission system are investigated numerically and ex- perimentally, and the system consists of a periodical rectangular grating and two uniform brass plates in water. We reveal that the pass-band of the asymmetric acoustic transmission is closely related to the grating period, but is affected slightly by the brass plate thickness. Moreover, the transmittance can be improved by adjusting the grating period and other structural parameters simultaneously. The control method of the system has the advantages of wider frequency range and simple operation, which has great potential applications in ultrasonic devices.The controls of the pass-bands in an asymmetric acoustic transmission system are investigated numerically and ex- perimentally, and the system consists of a periodical rectangular grating and two uniform brass plates in water. We reveal that the pass-band of the asymmetric acoustic transmission is closely related to the grating period, but is affected slightly by the brass plate thickness. Moreover, the transmittance can be improved by adjusting the grating period and other structural parameters simultaneously. The control method of the system has the advantages of wider frequency range and simple operation, which has great potential applications in ultrasonic devices.

关 键 词：asymmetric acoustic transmission pass-band control grating diffraction Lamb mode 

分 类 号：O422[理学—声学]