Multi-band asymmetric acoustic transmission in a bended waveguide with multiple mechanisms

Multi-band asymmetric acoustic transmission in a bended waveguide with multiple mechanisms
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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
Ding Xin-lei
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Huang Yu-lei;Sun Hong-xiang;Xia Jian-ping;Yuan Shou-qi;Ding Xin-lei

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我们报告的实现的多频带设备的非对称声传输放置在弯曲波导内的声子晶体浸没在水中,实验和数值计算确定。在500 kHz以下的三个频段存在由多种机制引起的不对称声传输。除了声子晶体的带隙,我们还介绍了聋模和声子晶体与波导之间的相互作用。更重要的是,这种不对称传输可以通过机械旋转声子晶体的方棒来系统地控制。该器件具有多频带、宽频带、可调等优点,在超声器件中具有广阔的应用前景。
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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