A method of active absorption and active isolation using piezoelectric ceramic is posed for the excellent mechanic and electric coupling performance of piezoelectric material. Two pieces of piezoelectric ceramic are used as materials of active absorption and active isolation, two pieces of PVDF are placed in the front of the piezoelectric ceramic at distances d and 2d to measure the incident plane wave and the reflected wave. Voltages are applied on the surface of the piezoelectric ceramic in order to make the reflected wave and transmission wave zero using adaptive controlling. Finally emulation is carried out with plane wave and good absorption and isolation effects are achieved.
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