Durability test and observation on non-linear distortion in output waveform of anti-cavitation hydrophone in high intensity ultrasound

Novel anti-cavitation hydrophones were fabricated by depositing hydrothermally synthesized lead zirconate titanete polycrystalline film on the reverse surface of a titanium plate. These hydrophones were hard to be damaged by the measurement of the acoustic field formed by a high intensity therapeutic ultrasound (HITU) device. This hydrophone was not damaged by exposure to high-intensity acoustic field of ultrasound cleaner with generation of acoustic cavitation for about ten times longer than the conventional commercial hydrophone. The fabricated anti-cavitation hydrophone showed the wide frequency characteristics of the receiving sensitivity. Furthermore, we observed the output waveforms of the fabricated anti-cavitation hydrophone with distortion due to nonlinear propagation in water.