FIELD NOISE-RESISTANT TELEPHONE Russian patent published in 2023 - IPC H04M1/19 

FIELD: telephone communication.

SUBSTANCE: portable field noise-resistant telephone set for operation in conditions of increased acoustic noise. For this, in a field noise-resistant telephone, containing a handset consisting of a noise-resistant microphone and a telephone, a handset switch that feeds a bridge, a transmission amplifier, an automatic gain control circuit (AGC) of the signal, consisting of a linear amplifier, a frequency-dependent detector, a smoothing RC-circuit and an attenuator, a transmission path switching unit consisting of an electronic key, an amplifier-detector and a double smoothing RC-circuit, a line matching device, an electronic inductor with a call button, a telephone set operation mode switch (TS), a reception amplifier, a call receiving device consisting of a diode bridge, an optical indicator, an electronic key, a multivibrator and an additional telephone, a terminal block for connecting a communication line and a communication line, additionally introduced supplement noise-resistant microphone, microphone amplifier and acoustic noise compensation device.

EFFECT: improving the quality of communication when operating both in silence and in conditions of increased acoustic noise.

1 cl, 1 dwg