Investigation of the Directivity of Shallow Ocean Low Frequency Ambient Noise with Single Vector Hydrophone

The ocean ambient noise contains abundant information of the ocean environment, so it is necessary to study its characteristics. As a function of frequency, geographical location and time, the directivity of ambient noise is an important characteristic of ocean ambient noise and an important factor affecting the gain of hydrophone array. A single vector hydrophone can simultaneously measure the acoustic pressure and particle velocity at the same point, and can be considered as a scalar array. In this paper, a method using minimum variance distortionless response (MVDR) beamforming for ocean ambient noise directivity analysis is studied, and the measured data of a shallow ocean low frequency ambient noise received by a single vector hydrophone is processed and analyzed. The results can be used to understand the ocean ambient noise characteristics of the area.