Feng Qian 1, 2, Li Quan 1, 3, Li-Wei Wang 1, Xiao-Zhou Liu 1, †, ![](http://cpb.iphy.ac.cn/html_resources/images/REemail.gif) , Xiu-Fen Gong 1
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(a)–(c) Simulated results of intensity patterns of a plane wave passing through the sample when f = 8300 Hz, 8400 Hz, 8500 Hz, respectively when giving dL = 9.5 mm. (d) Simulated result of intensity pattern of a plane wave passing through the undecorated sample when giving a specified impedance value at f = 8600 Hz. |