THE USE OF AIRGUN PRESSURE PULSES FOR CALIBRATING A LOW-FREQUENCY STANDARD HYDROPHONE*

A new technique is developed for calibrating a low-frequency hydrophone. The technique involves the use of pressure pulses radiated by the Par 0.65 liter airgun when fired at a fixed depth but with various values of initial chamber pressure. The sensitivity of a low-frequency hydrophone, when determined by the proposed technique, is found to be in agreement with that obtained by using the so-called “impulse method”.