FIELD: radio engineering. SUBSTANCE: method involves converting messages into electric signals of message source, matched filtration of electric signals from message source, their amplification, converting into signals of same type, transmission of signals through channel with arbitrary parameters into reception point, reception and converting of signals into received electric signal, transmission of signal to processing point, processing of electric signals of message source and received electric signal, generation of signals to control matched filtration and additional active noise reduction electric signals which are amplified, converted into signals of same physical type and emitted to channel with arbitrary parameters up to message reception point. Said method in particular discloses acoustic playback method and method for optimal three-dimensional active attenuation of level of arbitrary signals. Device has signal source and playback channel which is designed as low-pass amplifier and loudspeaker, which are connected in series, sounding device, signal processing unit and communication line. Signal processing unit provides possibility of generation additional signals for active noise reduction. EFFECT: increased precision of information transmission. 19 cl, 7 dwg
