HYDROACOUSTIC INFORMATION DISPLAYING METHOD Russian patent published in 2020 - IPC G01S3/80 

FIELD: acoustics.

SUBSTANCE: present invention relates to hydroacoustics. Disclosed is a method of displaying hydroacoustic information, comprising receiving a static fan signal from S directional characteristics, in which from the output of each spatial channel a set of sampled samples is made on a fixed time interval T, performing a spectral analysis of the time set of samples from the output of each spatial channel, which is performed using the FFT procedure, from the output of each spatial channel, the separated spectrum is divided into k frequency ranges, the sum ∑Ajk of amplitudes Aj of spectral components of each frequency band in each channel and displaying on the display the information in the colour luminance form, in which the minimum value of the sum is selected as the level of interference ∑Ajmin of signal amplitudes in spatial channel, and to select the threshold, determining the average sum of the amplitudes over all S spatial channels of the current time interval, determining for each frequency band a threshold A_kthr for each frequency band as determining adjacent spatial channels, in which ∑Ajk > A_kthr in each frequency range, those adjacent spatial channels, in which this condition is observed for more than N adjacent spatial channels, performing measurement and comparison operations on V consecutive time sets.

EFFECT: invention is intended for displaying results of noise emission signal processing and recognition of hydroacoustic objects.

1 cl, 1 dwg