Development of low-frequency co-vibration vector hydrophone used forunderwater target monitoring

In this paper, based on 3D piezo-electric accelerometer, a co-vibration vector hydrophone applicable at low frequency is designed and its acoustic performance is calculated. A sample of this vector hydrophone is made and tested. The diameter of the vector hydrophone sample is 78 mm. Test of sensitivity and directivity is proceeded in a standing wave tube. The test results are consistent with the calculation results. The vector hydrophone has high sensitivity and ‘8’ shape directivity at low frequency. This vector hydrophone is appropriate for underwater acoustic detecting on platforms such as float,subsurface buoy and UUV(unmanned underwater vehicle).