METHOD FOR DIRECTIONAL RECEIPT OF HYDROACOUSTIC SIGNALS Russian patent published in 2007 - IPC H04R1/44 

FIELD: technical hydro-acoustics.

SUBSTANCE: method includes receipt of acoustic oscillations in N points, located at distance d from each other at length of straight line L=d(N-1) long, transformation of acoustic oscillations to electric oscillations, electric compensation of oscillations along axis of directivity characteristic in direction counted from center of length of line of angle α₀, introduction of time delays between electric oscillations, transformation of electric oscillations, received in each pair of points 1 and i, (i=), at distances d(i-1) from each other, into mutual energy spectrums G_1,i(f_n), selection of N-1 active components of mutual energy spectrums S_1,i(f_n) in n frequency points with given resolution Δf and their energy addition at each one of frequencies f_n. Before transformation of electric oscillations, received in each pair of points 1 and (i=) to mutual energy spectrums, filtration of these electric oscillations is performed in bands Δf at each one of average frequencies of spectral analysis f₁, f₂,...,f_n with selection of these bands from inequality C/3λ_W(N-1) ≥ Δf ≥ 1/, where C - sound speed in water, λ_W - wave length at upper frequency of working range of frequencies, N - number of receipt points, ε_fl fluctuation component during signal receipt, - given time of averaging across the group of spectrum realizations during performing of mutual-spectral analysis in real time scale.

EFFECT: increased spatial selectivity of receipt in f bands of broadband random signals with usage of all receipt points without loss of information due to optimization of resolution of mutual energy and spectral analysis.

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