Specific features of estimation of levels and spatial spectrum of ocean noise by a single multicomponent combined receiver

Algorithms for estimation of the spatial spectrum of ocean noise using a single hydroacoustic combined receiving module (CRM), which records the field of acoustic pressure and its gradient projections onto three mutually orthogonal spatial directions for small wave sizes, are discussed. It is shown that in spite of a rather “obtuse” cosine directional response pattern of vector channels of this receiving module it is possible to obtain good determination of the direction toward the local source due to recording the vector characteristic of the acoustic field (acoustic power flux), and in the absence of powerful local sources in the water area the spatial spectrum of noise close to a realistic one can be obtained.