Tunable acoustic radiation pattern assisted by effective impedance boundary
Feng Qian1, 2, Li Quan1, 3, Li-Wei Wang1, Xiao-Zhou Liu1, †, , 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 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.