FIELD: radio engineering.
SUBSTANCE: invention relates to the field of radio engineering, namely to receivers, and can be used to detect earpieces. The claimed device includes an inductor, an amplifier and a speaker. The body and frame of the inductor are made of a material that is neutral for electromagnetic waves. Amplification of the input signal from the inductor is carried out by a cascade of amplifiers connected in series to the coil, connected to a speech frequency band filter connected to an analog-to-digital converter with a built-in computing module.
EFFECT: increasing the reception range to the maximum possible propagation length of magnetic waves, as well as the selectivity of detection.
7 cl, 1 dwg
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