Rezumat
The capability of generation by underwater electric discharges of acoustic fields in ultrasonic range up to 120 kHz is established at usage of current impulses with short leading edges. The relation of duration of such fronts to the size of a stripped part of a current-conductive rod – anode adjoining to a discharge gap is rotund. Is demonstrated that at an electrodigit cavitation there is a capability of a resonance activation cavita- tion is bubble dimensioned less than 0,1 mms in cavitation area.