S.N. Panychev – Dr. Sc. (Eng.), Associate Professor, Leading Research Scientist, CSID JSC «STC of REW» (Voronezh) E-mail: pany4ev@mail.ru

V.M. Pitolin – Dr. Sc. (Eng.), Professor, Department of Electrical Engineering, Voronezh State Technical University E-mail: pitol@mail.ru

N.A. Samotsvet – Post-graduate Student, Department of Electric Drive, Automatic Equipment and Managements in Technical Systems, Voronezh State Technical University; Senior Research Scientist, CSID JSC «STC of REW» (Voronezh) E-mail: csir.ntc.reb@gmail.com

D.A. Samotsvet – Undergraduate, Department of Electric Drive, Automatic Equipment and Managements in Technical Systems, Voronezh State Technical University

E-mail: samdem@bk.ru

The description of the new method of acoustic information protection, based on useful application of nonlinear effects of intermodulation in casual antennas, is provided. Advantages of a method in comparison with known methods of counteraction to leakage of acoustic information on channels of collateral electromagnetic radiations are shown and practical recommendations about realization of a method in practice of protection of acoustic information are made.

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