FIELD: electric communication systems, in particular, systems employing acoustical waves, applicable in masking of information acoustic signal against unauthorized recording of it, for example, with the aid of a dictating of it, for example, with the aid of a dictating machine. SUBSTANCE: method consists in generation of an amplitude-manipulated radio-frequency signal, its reception and forming of masking electric signal out of it. The received information acoustic signal is converted in an information electric signal out of it. The received information acoustic signal is converted in an information electric signal that is mixed with the masking electric signal and isolated in the terminal load. EFFECT: facilitated procedure. 2 cl, 5 dwg
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