The product "LGSh-304" is designed to protect acoustic speech information containing information constituting a state secret and other information with limited access, circulating (processed) in the premises, by forming acoustic masking noise interference.
The product "LGSh-304" corresponds to: - type "B" of means of acoustic protection of information with an active (containing in its design an individual setting source of noise) converter, powered through the secondary power supply line from the central power supply.
The product "LGSh-304" meets the requirements of "Requirements for means of active acoustic and vibration protection of acoustic speech information" (FSTEC of Russia, 2015) - for protection class 1.
The product "LGSh-304" can be installed in dedicated premises up to and including category 1.
The LGSh-304 product is equipped with a visual system for indicating normal operation and a visual and sound system for indicating emergency operation (failure).
The LGSh-304 product is equipped with a time-of-use counter that records and displays in hours and minutes the total time of operation of the Product in the masking interference generation mode.
The design of the LGSh-304 Product ensures protection of the output noise signal level adjustment 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 28 Sound pressure adjustment level range in the band with a geometric mean frequency of 1000 Hz, dB, not less than 10 Power consumed from the network not more than 10 VA Overall dimensions of the LGSh-304 Product not more than 140x70x70 mm Overall dimensions of the power supply not more than 80x60x70 mm Weight of the LGSh-304 Product not more than 0.4 kg Weight of the power supply not more than 0.4 kg Supply voltage (single-phase AC network) 187 V-242 V Continuous operation time not less than 8 hours Ambient air temperature from 1 to 40 °C Relative air humidity not more than 80% at 25 °C Atmospheric pressure 630–800 mm Hg Mean time between failures is not less than 6,000 h Average service life is 7 years Product resource "LGSh-304" is not less than 27,000 h