FIELD: hydro-acoustics.
SUBSTANCE: the method includes emitting high frequency excitation signal and signals of combination frequencies of excitation signal and useful low frequency signal are received. In close proximity of receiving element of parametric receiving antenna by means of calibrating tonal emitter signal is generated, shifted by frequency relatively to useful signal for a certain value. At output of processing circuit, useful and frequency-shifted signals are recorded and their amplitudes are compared. On basis of analysis of these signals, presence of interference and its character are determined. As useful signal, signal from airborne, waterborne or underwater objects is used. Emitted additionally is frequency-adjustable high frequency signal of acoustic spectroscopy of sound dispersers, dominating in parametric receiving antenna area, which is later received and analyzed. Excitation signal matches one of resonances of receiving element of parametric receiving antenna and approaches resonance frequency of sound dispersers dominating in the area of the parametric receiving antenna.
EFFECT: ensured efficient functioning of hydro-acoustic device, composition of which includes parametric receiving antenna for detection and recognition of different objects.
5 dwg
