DEVICE FOR PROTECTING ACOUSTIC INFORMATION FROM HIGH-FREQUENCY RADIATION OVER RADIO CHANNEL Russian patent published in 2024 - IPC H04K1/04 H04K3/00 H04M1/68 

FIELD: radio engineering; electronics.

SUBSTANCE: invention can be used to protect speech (acoustic) information from strangers using active devices for unauthorized retrieval of information, using high-frequency irradiation of objects from the protected room, subject to the microphone effect, and having the ability to re-emit the probing signal into the open space, thereby forming a radio channel, as well as for protection of speech (acoustic) information from strangers using passive devices for unauthorized information retrieval, using semi-active irradiation of objects from the protected premises with carrier radiations of local radio stations. Disclosed device comprises a broadband radio scanner and an adaptive generator of electromagnetic narrowband interference. In a broadband radio scanner, consisting of an antenna, a high-frequency radiation detection unit, a high-frequency radiation source frequency determining unit, unit for determining radiation frequencies of radio embeddable devices and control unit, additionally there is a unit for determining the presence of semi-active high-frequency radiation and a unit for generating the second and third harmonics of the frequency of the high-frequency radiation source. Device can be used both for protection of acoustic (speech) information from interception using high-frequency both active and semi-active radiation, and together with a computer as a portable means of radio control with display of the scanned frequency range, detected high-frequency imposing signals and generated interference signals.

EFFECT: broader functional capabilities of the device and high efficiency of protecting acoustic information from high-frequency radiation over a radio channel.

1 cl, 1 dwg