Controls of pass-bands in asymmetric acoustic transmission |
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| Affiliation: | 1. Laboratory of Modern Acoustics, Institute of Acoustics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China;2. Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, China;3. State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China |
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| Abstract: | ![]()
The controls of the pass-bands in an asymmetric acoustic transmission system are investigated numerically and experimentally, 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. |
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| Keywords: | asymmetric acoustic transmission pass-band control grating diffraction Lamb mode |
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