Tunable acoustic radiation pattern assisted by effective impedance boundary

Feng Qian^{1, 2}, Li Quan^{1, 3}, Li-Wei Wang¹, Xiao-Zhou Liu^{1, †,}, Xiu-Fen Gong¹

(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 d_L = 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.