Abstract: A combined pressure-resistant co-vibrating vector hydrophone for underwater glider platform was designed to meet the needs of developing a combined small size and pressure-resistant co-vibrating vector hydrophone for underwater glider prototype. The sound pressure and vector channels are designed acoustically according to the working principle of vector hydrophone. The pressure-resistant characteristics of piezoelectric ceramic elements and thin-walled aluminum alloy shell are simulated and analyzed. The pressure-resistant capacity and electro-acoustic parameters of the vector hydrophone were tested, and the vector hydrophone was integrated into the underwater acoustic glider. Sea trial was carried out in a sea area in the South China Sea. The information of underwater acoustic field in the range of 100- 3 000 Hz was collected during the sea trial, the changing curves of different frequency noise levels with time were given, and the change of nose level at different frequency points was got when a surface ship passed. Results show that the vector hydrophone can reliably work in the depths of 1 200 meters and the different frequency noise level changes, the design of the vector hydrophone can meet the demand of application of underwater acoustic glider prototype.

Key words: vectorhydrophone, underwateracousticglider, combinedco-vibrating, pressure-resistantdesign, seatrial