Design and test about high sensitivity thin shell piezoelectric hollow sphere hydrophone

A spherical hydrophone is developed. The equivalent circuit model and finite element model about the thin piezoelectric spherical shells have been built to predict its major performances. Some hydrophone prototypes have been fabricated and the corresponding tests in the anechoic tank have been finished. The results show that the above two way to design and simulate the thin piezoelectric spherical shells are both effective, and the prototypes have the high sensitivity of -182dB at 150 kHz.