Acoustic Multi Emission Lens via Transformation Acoustics
Acoustic Multi Emission Lens via Transformation Acoustics
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DOI：
10.1088/0256-307x/35/10/104301
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发表时间：
2018-10-01
影响因子：
3.5
通讯作者：
Abdolali, A.
中科院分区：
文献类型：
--
作者：
Barati, H.;Basiri, Z.;Abdolali, A.
基于变换声学方法，提出了一种设计声非谐振透镜天线的算法，该算法能够产生多个指向性波束。与以前的作品无法实现，本方法是能够单独调整每个辐射波束的方向性，这是在几个声学应用，如声纳系统中的最重要的。线性变换函数被有意地用于消除所获得的材料的不均匀性，并为更一般的声学模式铺平道路。几个数值模拟进行显示所提出的方法在操纵声波的能力。为了验证这一概念，根据有效介质理论，利用非共振超流体双层结构实现了一种能产生四束不同方向性光束的结构。
Based on transformation acoustic methodology, we propose an algorithm for designing acoustic non-resonant lens antenna, which is competent to generate multiple directive beams that are pointing at the desired direction. Unattainable with previous works, the present approach is capable of adjusting the directivity of each radiated beam individually, which is of the utmost importance in several acoustic applications such as in sonar systems. A linear transformation function is intentionally used for eliminating the inhomogeneity of the obtained materials and to pave the way towards more general acoustic patterns. Several numerical simulations are performed to show the capability of the proposed method in manipulating the acoustic waves. To authenticate the concept, a structure that can generate four beams with different directivities is realized with non-resonant meta-fluid bi-layered structure through effective medium theory.