Active control of scattered acoustic fields: Cancellation, reproduction and cloaking
Active control of scattered acoustic fields: Cancellation, reproduction and cloaking
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DOI：
10.1121/1.4962284
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发表时间：
2016-09-01
影响因子：
2.4
通讯作者：
Cheer, Jordan
中科院分区：
文献类型：
--
作者：
Cheer, Jordan
声场的主动控制已广泛应用于主动噪声控制和声场再现方面，然而，针对主动声学隐身的研究相对较少。为了建立在主动噪声控制和声场再现领域的知识和理解的基础上，本文研究了相应的物理限制，并将其与在存在声散射体的情况下采用三种策略时的主动隐形问题进行比较。三种声场控制策略是在一致的框架内制定的，这使得人们能够深入了解物理控制机制。然后模拟了两个不同的三维散射问题，并用于研究这三种策略的性能限制。研究了控制源的数量和接近散射物体的影响，结果表明主动隐身的要求不同于主动噪声控制和声场再现的要求。具体来说，已经表明在这三种情况下控制内部和外部声场之间存在明显的区别。 (C) 2016 年美国声学学会。
The active control of sound fields has been widely applied in both active noise control and sound field reproduction, however, relatively few studies have focused on active acoustic cloaking. In order to build upon the knowledge and understanding in the areas of active noise control and sound field reproduction, this paper investigates the corresponding physical limitations and compares them to the active cloaking problem when the three strategies are employed in the presence of an acoustic scatterer. The three sound field control strategies have been formulated within a consistent framework, and this has enabled insight into the physical control mechanisms. Two different three-dimensional scattering problems have then been simulated and used to investigate the performance limitations of the three strategies. The influence of the number and proximity of control sources to the scattering object have been investigated, and it has been shown that the requirements for active cloaking differ from those for active noise control and sound field reproduction. Specifically, it has been shown that there is a clear distinction between controlling the internal and external sound fields in the three cases. (C) 2016 Acoustical Society of America.