The product is designed to protect acoustic speech information circulating in rooms intended for discussion or reproduction, as well as for holding events with discussion of restricted information that does not contain information constituting a state secret, from information leakage via vibroacoustic and acoustic channels. The LGSh-402 product corresponds to type "A" - means of acoustic and vibration protection of information with a central generator unit and passive (not containing individual noise sources requiring power supply in their design) converters connected to it via communication lines.
The LGSh-402 product complies with the requirements of the document "Requirements for means of active acoustic and vibration protection of acoustic speech information" (FSTEC of Russia, 2015) - according to protection class 4. LGSh-402 is a two-channel noise generator. The resistance value of the electromagnetic vibration transducers is 8 Ohm. Parallel-serial connection of up to 4 electromagnetic vibration transducers and an acoustic emitter to each channel is allowed so that the total load resistance is 4 Ohm. The total number of vibration transducers connected to the generator is 8 pcs. The LGSh-402 product is equipped with a visual system for indicating normal operation. The design of the LGSh-402 product ensures protection of the output noise signal level control organs from unauthorized changes and detection of unauthorized access to them.
Operating frequency range, Hz 175 - 11200 Sound pressure adjustment level range, dB, not less than 35 Power consumed from the network not more than 20 VA Overall dimensions of the generator unit "LGSh-402" not more than 145x100x50 mm Overall dimensions of the vibration transducer "LVP-2S" not more than 40x25 mm Overall dimensions of the vibration transducer "LVP-2T" not more than 40x20 mm Overall dimensions of the vibration transducer "LVP-2O" not more than 40x12 mm Overall dimensions of the acoustic emitter "LVP-2a" not more than 66x66x25 mm Weight of the generator unit "LGSh-402" not more than 0.6 kg Weight of the vibration transducer "LVP-2S" no more than 0.1 kg The weight of the vibration transducer "LVP-2O" no more than 0.05 kg The weight of the vibration transducer "LVP-2T" no more than 0.05 kg The weight of the acoustic emitter "LVP-2a" no more than 0.15 kg Supply voltage (single-phase AC network) 187 V-242 V Continuous operation time around the clock Ambient air temperature from 1 to 40 °C Relative air humidity no more than 80% at 25 °C Atmospheric pressure 630–800 mm Hg