Influence and Improvement of Vector Hydrophone Channel Phase Inconsistency on Forward Interference Suppression
The vector hydrophone can synchronously and independently measure the orthogonal components of sound pressure and particle vibration velocity at a point in space,and a single vector hydrophone can form different directivity by combining different weight coefficients.Forward interference suppression can be achieved when unilateral cardioid polar di-rectivity is formed.However,when the phase of each channel is inconsistent,the capability of forward interference suppres-sion will be greatly affected.To solve this problem,the influence of phase inconsistency on the zero depth of cardioid di-rectivity of vector hydrophone is verified by simulation and experiment,and a method of phase compensation using FFT to calculate the initial phase difference is proposed to reduce the influence of phase inconsistency on the measurement results.The feasibility of the proposed method is verified by simulation and experiment.
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