METHOD OF FORMING THE DIRECTED RADIATION OF LOW-FREQUENCY SIGNALS Russian patent published in 1997 - IPC

FIELD: hydroacoustics. SUBSTANCE: two audio signals of similar frequency are formed and amplified by units 1 and 2 at frequencies ω₁ and ω₂. These signals are then mixed in adder 3 and supplied to pumping radiator 4 which is used to irradiate preset section of water medium. Pumping waves are radiated at resonant frequency of sound biological scatterers dominating in given day time, in definite geographical region of world ocean. Pumping signal radiation at frequencies corresponding to resonant frequency of sound biological scatterers increases effectiveness of pumping wave energy conversion to wave energy of difference frequency. EFFECT: more effective use of sound parametric radiators. 4 dwg