Asymmetric acoustic transmission in multiple frequency bands

Asymmetric acoustic transmission in multiple frequency bands
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多频段的非对称声学传输

DOI:
10.1063/1.4936609
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发表时间:
2015-11
影响因子:
4
通讯作者:
Zhang Shu-yi
Zhang Shu-yi
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Sun Hong-xiang;Yuan Shou-qi;Zhang Shu-yi

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我们通过实验和数值证明,通过在浸入水中的两块黄铜板两侧放置两个不同周期的周期性光栅,实现了非对称声传输的多频带装置。非对称声传输可以存在于 1500 kHz 以下的四个频带中,这是由浸入水中的黄铜板中的两个光栅和兰姆模式的各种衍射之间的相互作用引起的。结果表明,该器件具有多频段、更宽的带宽、结构更简单的优点。我们的发现应该在超声波设备中具有巨大的潜在应用。
We report both experimentally and numerically that the multi-band device of the asymmetric acoustic transmission is realized by placing two periodic gratings with different periods on both sides of two brass plates immersed in water. The asymmetric acoustic transmission can exist in four frequency bands below 1500 kHz, which arises from the interaction between various diffractions from the two gratings and Lamb modes in the brass plates immersed in water. The results indicate that the device has the advantages of multiple band, broader bandwidth, and simpler structure. Our finding should have great potential applications in ultrasonic devices.
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