FIELD: hydroacoustics. SUBSTANCE: device has water-filled measuring tank in which hydrophones to be calibrated are mounted. Measuring tank is connected to additional water-filled tank by means of flexible hose. Periodic sine-shaped movement of additional tank in vertical direction by means of electric drive causes periodic alterations of pressure in measuring tank. Said alterations are converted to output signal. In addition to hydrostatic pressure which is calculated using simple equation, hydrophone is subjected to another pressure constituent caused by inertia. This constituent determines calibration error. Inertia constituent depends on frequency of oscillations of additional tank and its sign is opposite to that of hydrostatic pressure. This means that they compensate each other at specific frequency so that hydrophone outputs zero signal. Measured frequency of zero signal is used in equation for measurement of calibration coefficient. Since frequency measurements have highest precision, calibration of hydrophones using disclosed method has minimal error. EFFECT: increased precision of calibration, simplified design of measurements, possibility for automatic design of absolute calibration, increased reproducibility of calibration results. 1 dwg
