FIELD: hydroacoustic systems which detect signal slope angle. SUBSTANCE: method involves addition of first receiver's signal which is delayed and amplified by B factor, and of second receiver's signal which is amplified by A factor, and comparison of this sum against its value which is delayed by given time and amplified by C factor. Corresponding device has two spaced receivers, multipliers of amplitude of received signals, two delay gates, adder, subtraction unit, extreme regulator, third multiplier of signal at output of subtraction unit. EFFECT: increased efficiency of beam pattern. 2 cl, 2 dwg
