Directional acoustic source by scattering acoustical elements
Directional acoustic source by scattering acoustical elements
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DOI：
10.1063/1.2743947
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发表时间：
2007-05-28
影响因子：
4
通讯作者：
Sanchez-Dehesa, Jose
中科院分区：
文献类型：
--
作者：
Hakansson, Andreas;Torrent, Daniel;Sanchez-Dehesa, Jose
高度定向的光源在许多领域都有广泛的应用。作者报道了一种反向设计的散射声学元件装置，该装置将全向超声源转换为高度定向的超声源。这种二维设计显示出比先前提出的其他设计更好的整体建模性能，包括小于5度的半功率角宽度。实验演示是在超声波范围内进行的，使用水听器作为全向源和氧化铝棒阵列作为散射声学元件的积木。测得的半功率角宽度为6度，该值支持设计工具的高可靠性。(C)2007年，美国物理学会。
Highly directional sources are desirables in a variety of fields for many applications. The authors report an inverse designed scattering acoustical element device that transforms an omnidirectional ultrasonic source into one highly directional. This two-dimensional design shows an overall better modeled performance than other previously proposed, including a half-power angular width less than 5 degrees. The experimental demonstration is performed in the ultrasonic range, using a hydrophone as omnidirectional source and an array of alumina rods as building blocks for the scattering acoustical elements. The measured half-power angular width is 6 degrees, a value that supports the high reliability of the designing tool. (C) 2007 American Institute of Physics.