FIELD: physics, communication.
SUBSTANCE: invention is related to method and device for protection of confidential acoustic information and may be used for protection against unauthorised tapping and recording of confidential acoustic information mostly in closed rooms. Substance of invention consists in generation of electric noise signal, transformation of electric noise signal into masking noise acoustic signal, at that masking noise signal used is multi-voice speech noise, which is generated from single-voice speech noises, at that single-voice speech noise is accidental sequence of elementary speech sounds in frequency range of 50-15,000 Hz with different timbre, interval between them and frequency of speech sounds use determined by phonetic composition of language specific for modern pronunciation, at that single-voice speech noises are summed into multi-voice speech acoustic noise.
EFFECT: higher reliability of operation by provision of lower syllabic articulation with account of highest sensitivity of auditory organ in frequency range of 1,500-4,000 Hz in transformation of speech signal into electric one.
2 cl, 1 dwg
