FIELD: information technology.
SUBSTANCE: invention can be used for absolute complex field calibration of hydrophones to obtain the magnitude and phase angle of sensitivity of the hydrophones for the acoustic centre of the hydrophones. The existing reciprocity method is supplemented with repeating reciprocity method procedures for a reversible transducer-calibrated hydrophone pair after turning the hydrophone by 180°. As a result, change in time delay of the signal of the reversible transducer received by the hydrophone is measured, while changing the direction of reception of the hydrophone from the initial direction to the opposite direction, and phase incursion, which corresponds to the measured time delay, is calculated at the frequency of the experiment. The hydrophone and the reversible transducer are then irradiated by a radiator and the reciprocity method procedures are repeated. The obtained phase incursion values are entered as an adjustment when determining the phase angle of the complex sensitivity of the hydrophones.
EFFECT: eliminating error in phase calibration of a hydrophone, arising due to mismatch of the geometric and acoustic centres of the hydrophone.
1 dwg
