FIELD: electroacoustics. SUBSTANCE: d. c. voltage U is applied to transducer movable electrode in the form of metallized insulating film and to fixed electrode when transducer is turned on. When transducer is turned off, d. c. voltage is taken off electrodes and at that moment sequence of unlike-polarity rectangular pulses is shaped, their amplitude being monotonically reduced from U to zero. EFFECT: facilitated procedure. 1 dwg
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