An experimental investigation into a dual taper acoustic black hole termination.
An experimental investigation into a dual taper acoustic black hole termination.
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DOI：
10.1121/10.0013899
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发表时间：
2022-09
影响因子：
1
通讯作者：
K. Hook;J. Cheer;A. Karlos
中科院分区：
文献类型：
--
作者：
K. Hook;J. Cheer;A. Karlos
声波黑洞（ABHs）可以对反射波分量提供有效的阻尼，用于终止光束。ABH的特性是它的局部模式，产生高吸收的窄频带。为了提高ABH终端的性能，以前已经提出了多锥度ABH，分析结果表明，使用两个或多个锥度会对反射系数产生复合效应，从而产生更多的低反射波段。本文扩展了这项工作，并提出了一个多锥度ABH的实验实现，证实了先前的分析结果。
Acoustic black holes (ABHs) can provide effective damping of the reflected wave component when used to terminate a beam. The behaviour of an ABH is characterised by its local modes, which produce narrow frequency bands of high absorption. To enhance the performance of ABH terminations, a multi-taper ABH has previously been proposed and analytical results demonstrate that the use of two or more tapers produces a compound effect on the reflection coefficient, resulting in more bands of low reflection. This paper extends this work and presents an experimental realisation of a multi-taper ABH confirming the previous analytical results.