METHOD OF CLASSIFICATION OF HYDRO ACOUSTIC SIGNALS OF MARINE OBJECTS NOISE EMISSION Russian patent published in 2020 - IPC G01S3/80 

FIELD: physics.

SUBSTANCE: present invention relates to hydroacoustics and is intended for classification of noise emission signals of detected objects, including noise emission signals caused by bioacoustics sources. Method of classification of hydroacoustic signals of marine objects noise emission comprises receiving noise signal of target by two halves of directivity characteristic of one antenna in wide operating band of frequencies, from output of each half of antenna signal is converted into digital form, successively in time by sets are transmitted for processing, spectral analysis of each time realization is carried out, based on Fourier transform, energy spectrum of the noise emission signal is determined, at the output of each half of the antenna the spectrum of the noise emission signal is determined, determining frequency ranges of the noise emission spectrum, determining the interference spectrum, in the same frequency bands, determining the signal/interference ratio in each frequency range, repeated determination of the signal-to-interference ratio over time-series sets of N input realizations, determining the average signal-to-interference ratio over each frequency band M_SIi, mean-square deviation from average value is determined for each MSD_Mi frequency range, decision in favor of absence of noise signal of real target is made: if MSDm1 < P1 in the first frequency range is less than the threshold, the root-mean-square deviation of the signal-to-noise ratio in the second frequency range is greater than the MSDm2 > P2 threshold, the root-mean-square deviation of the signal-to-noise ratio in the third frequency band is greater than the MSDm3 > P3 and difference of average Men values of second and third frequency range is less than threshold P4.

EFFECT: technical result is expansion of functional capabilities.

1 cl, 1 dwg