Acoustic transmission enhancement through a stiff plate drilled with subwavelength side openings

Acoustic transmission enhancement through a stiff plate drilled with subwavelength side openings
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通过钻有亚波长侧孔的刚性板增强声学传输

DOI:
10.1209/0295-5075/93/34004
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发表时间:
2011-02
期刊:
EPL
影响因子:
1.8
通讯作者:
Liu, Zhengyou
Liu, Zhengyou
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Peng, Pai;Qiu, Chunyin;Hao, Rui;Lu, Jiuyang;Liu, Zhengyou

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本文研究了在水中开有一维周期性矩形孔的黄铜板的声传输特性。这种新的几何结构可以很好地揭示声学系统中的独特性质,这些性质根源于纵波和横波之间的复杂耦合。除了与规则腔模相关的透射峰外,我们还观察到两种额外类型的亚波长峰。一个源于耦合无泄漏兰姆模的共振激发,另一个对应于立板模的激发。特别是,后者是鲁棒的亚波长区域,以前没有引起注意。
We study the acoustic transmission through a water-immersed brass plate drilled with a one-dimensional periodical array of rectangular side openings. This new geometry can reveal well the unique properties in acoustic systems, which are rooted in the complex coupling between the longitudinal and transverse waves. Besides the transmission peaks related with regular cavity modes, we observe two additional types of subwavelength peaks. One stems from the resonant excitation of the coupled nonleaky Lamb modes, and the other corresponds to the excitation of the standing plate modes. In particular, the latter is robust in the subwavelength region and has attracted no attention previously.
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