Method of Calibrating Infrasonic Hydrophones(Sposob Graduirovki Infrazvukovykh Gidrofonov)
ARMY FOREIGN SCIENCE AND TECHNOLOGY CENTER CHARLOTTESVILLE VA
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A method is discussed for calibrating infrasonic hydrophones by way of varying hydrostatic pressure in a liquid. It differs by the fact that for the purpose of increasing accuracy and widening the range of measurements on the side of high frequencies, the hydrophone is rigidly fixed in the cavity of an air-water resonator, in the neck of which vertical oscillations of the medium are generated. From the amplitude of oscillations of the free liquid surface, sensitivity of hydrophones is determined as the ratio of output stress to the sonic pressure acting at the hydrophone input.
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