In order to realize detection of high sensitivity underwater acoustic signal

a multi-model cascade resonant vector hydrophone is designed. Multi-sensing mechanism model

include two-order vibration system model and displacement transfer model and bending vibration models are introduced. On this basis

vector hydrophone shared structure with multi-devices is designed and sample is fabricated. Acoustic performance of the sample is tested. Test results show that acoustic pressure sensitivity of vector hydrophone can reach-196 dB（ 100 Hz）. The vector hydrophone can implement acoustic detection

underwater target accurate orientation and navigation because of its characters of simple structure

high stability

reliability

low frequency and high sensitivity.