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Interference-induced angle-independent acoustical transparency

机译：干扰引起的与角度无关的声音透明度

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摘要

It is revealed that the Fano-like interference leads to the extraordinary acoustic transmission through a slab metamaterial of thickness much smaller than the wavelength, with each unit cell consisting of a Helmholtz resonator and a narrow subwavelength slit. More importantly, both the ' theoretical analysis and experimental measurement show that the angle-independent acoustical transparency can be realized by grafting a Helmholtz resonator and a quarter-wave resonator to the wall of a narrow subwavelength slit in each unit cell of a slit array. The observed phenomenon results from the interferences between the waves propagating in the slit, those re-radiated by the Helmholtz resonator, and those re-radiated by the quarter-wave resonator. The proposed design may find its applications in designing angle-independent acoustical filters and controlling the phase of the transmitted waves.
机译：结果表明，类似法诺的干扰会通过厚度远远小于波长的平板超材料引起非凡的声音传输，每个单位单元都由亥姆霍兹共振器和狭窄的亚波长狭缝组成。更重要的是，理论分析和实验测量均表明，通过将亥姆霍兹谐振器和四分之一波长谐振器接枝到狭缝阵列的每个单位单元中窄亚波长狭缝的壁上，可以实现与角度无关的声音透明性。观察到的现象是由在缝隙中传播的波，由亥姆霍兹谐振器再辐射的波和由四分之一波长谐振器再辐射的波之间的干扰引起的。所提出的设计可以在设计与角度无关的声学滤波器和控制发射波的相位中找到其应用。

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  • 来源
    《Journal of Applied Physics》 |2014年第23期|234506.1-234506.6|共6页
  • 作者

    Lehua Qi; Gaokun Yu; Xinlong Wang; Guibo Wang; Ning Wang;

  • 作者单位

    Department of Marine Technology, Ocean University of China, Qingdao 266100, China;

    Department of Marine Technology, Ocean University of China, Qingdao 266100, China;

    Key Laboratory of Modern Acoustics and Institute of Acoustics, Nanjing University, Nanjing 210093, China;

    Shipbuilding Information Center of China, Beijing 100012, China;

    Department of Marine Technology, Ocean University of China, Qingdao 266100, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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