The acoustic nonreciprocal device has attracted the attention of some researchers because of the potential practical applications, for example, biomedical ultrasound applications, energy saving, and harvesting. We propose a low-frequency acoustic generation and nonreciprocal transmission device inspired by the previous studies and nature of the vibro-acoustic propagation. We utilize ultrasonic transducer to form acoustic radiation pressure on the water surface, which can vibrate water to produce low-frequency sound. Meanwhile, an ultrasonic metamaterial is designed based on our previous research. The metamaterial is placed under the metal sink to obstruct the 20 kHz ultrasonic waves and pass through the frequency sound waves. With that, the low-frequency acoustic sound is generated and pass through the metamaterial when the proposed device is in the forward configuration. When the device is in the backward configuration, the ultrasonic wave is obstructed by the metamaterials and metal sink bottom. Thus, no vibration is excited in the water, and therefore, no acoustic sound is generated. With the above-mentioned mechanism, the device can obtain the acoustic nonreciprocity in the very low-frequency range.
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6 December 2021
Research Article|
December 08 2021
Low-frequency acoustic generation and nonreciprocal transmission device
Jiyao Wang
;
Jiyao Wang
School of Electrical Engineering, Southeast University
, Nanjing, Jiangsu, China
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Ling Qin;
Ling Qin
School of Electrical Engineering, Southeast University
, Nanjing, Jiangsu, China
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Wei Xu
Wei Xu
a)
School of Electrical Engineering, Southeast University
, Nanjing, Jiangsu, China
a)Author to whom correspondence should be addressed: weixu@seu.edu.cn
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a)Author to whom correspondence should be addressed: weixu@seu.edu.cn
Appl. Phys. Lett. 119, 233501 (2021)
Article history
Received:
August 11 2021
Accepted:
December 01 2021
Citation
Jiyao Wang, Ling Qin, Wei Xu; Low-frequency acoustic generation and nonreciprocal transmission device. Appl. Phys. Lett. 6 December 2021; 119 (23): 233501. https://doi.org/10.1063/5.0066592
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