FIELD: acoustic-to-electric wave conversion. SUBSTANCE: microphone has relatively parallel receiving and transmitting membranes mounted on same axis inside case, first mechanoelectric transducer loaded into receiving membrane and connected to electromechanical transducer through amplifier. Electromechanical transducer is loaded into transmitting membrane for exciting oscillations in it which are in phase opposition to those of receiving membrane. Transmitting membrane is loaded into second mechanoelectric transducer whose output functions as microphone output. EFFECT: improved design. 1 dwg
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