METHOD FOR STUDYING THE STRUCTURE OF PRIMARY HYDROACOUSTIC FIELDS OF A NOISY OBJECT Russian patent published in 2023 - IPC G01S3/80 

FIELD: hydroacoustics.

SUBSTANCE: invention relates to the field of hydroacoustics and can be used to study the structure of the primary hydroacoustic fields of surface and underwater marine noisy objects (NO). The method consists in locating a hydroacoustic receiving module with a combined hydroacoustic receiver in a given area of a natural reservoir and measuring the acoustic radiation power of a noisy object, calculated on a computer, in the measurement plane passing through it and the receiving module. At the same time, the receiving module and the noisy object are placed in a natural reservoir so that the receiving module at the time of measurements is located in the alignment of the body of the noisy object at a distance of no more than half of its length, their mutual spatial position is determined, and the narrow-band acoustic power spectrum is calculated from the measured parameters of the hydroacoustic field. and it is used to find discrete and narrow-band frequency ranges requiring detailed analysis. In the selected frequency ranges in the measurement plane, diagrams of the spatial distribution of acoustic power flows are calculated, according to the diagrams, knowing the mutual spatial position of the noisy object and the receiving module, the angles of arrival of sound energy from the corresponding zone of emission of the noisy object to the receiving module are determined and the coordinates and acoustic power of the zones are calculated on the body of a noisy object, and the narrow-band acoustic power spectrum is calculated with a unit analysis bandwidth (frequency resolution) of not more than one-fifth of the smallest difference between adjacent discrete and/or narrow-band frequencies in the spectrum.

EFFECT: improving the accuracy of determining the coordinates on the hull of the radiation zones of the sources of a noisy object, their frequency ranges, the acoustic power of the radiation and contributions to the primary acoustic field of the measurement object, including in conditions of noisy factory water areas during mooring tests.

6 cl, 2 dwg