Multi-band asymmetric acoustic transmission in a bended waveguide with multiple mechanisms
Multi-band asymmetric acoustic transmission in a bended waveguide with multiple mechanisms
复制标题
具有多种机制的弯曲波导中的多频带非对称声传输
DOI:
10.1063/1.4955268
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发表时间:
2016-07
影响因子:
4
通讯作者:
Ding Xin-lei
中科院分区:
文献类型:
--
作者:
Huang Yu-lei;Sun Hong-xiang;Xia Jian-ping;Yuan Shou-qi;Ding Xin-lei
We report the realization of a multi-band device of the asymmetric acoustic transmission by placing a phononic crystal inside a bended waveguide immersed in water, as determined both experimentally and numerically. The asymmetric acoustic transmission exists in three frequency bands below 500 kHz induced by multiple mechanisms. Besides the band gap of the phononic crystal, we also introduce the deaf mode and interaction between the phononic crystal and waveguide. More importantly, this asymmetric transmission can be systematically controlled by mechanically rotating the square rods of the phononic crystal. The device has the advantages of multiple band, broader bandwidth, and adjustable property, showing promising applications in ultrasonic devices.
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