FIELD: radio engineering, communication.
SUBSTANCE: method includes the following steps: modulating a digital signal for generating an audio signal using a transmitting device using a binary frequency-shift keying (2FSK) scheme; reproducing the generated audio signal by the transmitting device; receiving the audio signal by a receiving device; sampling the audio signal by the receiving device and demodulating the sampled audio signal to obtain a digital signal by the receiving device.
EFFECT: high accuracy of reproducing audio signals.
8 cl, 2 dwg, 1 tbl
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