A minimum hydrophone bandwidth for undistorted cavitation noise measurement.

When measuring cavitation noise, the hydrophone represents a critical part in an acquisition chain because of its limited bandwidth. In this paper a minimum hydrophone's bandwidth required for undistorted cavitation pulses recording is examined. The procedure suggested in the paper is used to verify the validity of the recorded waves radiated by bubbles generated by underwater spark discharges. Extrapolation formulas for determining the necessary hydrophone's bandwidth when smaller or larger bubbles than generated in this work are studied are also suggested.