Device for protecting acoustic information from leakage via laser and vibroacoustic channels

Abstract

FIELD: radio engineering.SUBSTANCE: devices for protecting acoustic speech information from leakage. The device contains a lens 1, a tunable optical filter 2, a photodetector 3, an amplifier 4, a control unit 5, a power supply 8 and a filter control device 6. Noise source 9 generates a broadband electrical noise signal, which is adjusted in amplitude, amplified and transmitted to piezoelectric emitter 13. The control unit registers signals of unauthorized access and transmits control commands for restructuring the optical filter, as well as signals to the microcontroller 14, which controls the transistor switch 15 for supplying a broadband electrical noise signal, which is regulated in amplitude and amplified, to the piezoelectric emitter 18.EFFECT: increasing the protection of acoustic speech information from leakage via laser and vibroacoustic channels due to the impact of vibroacoustic interference on elements of engineering and technical communications, as well as monitoring of laser radiation and automatic impact of vibroacoustic interference on elements of reflective surfaces upon its detection.1 cl, 1 dwg

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