The Calibration of a Low-Frequency Calibrating System

Abstract : The receiving frequency responses of hydrophones in the 1- to 100-cps range are determined at the USRL in a closed tank system. The procedure requires that certain physical constants of the electrodynamic driver and the water- filled tank be known. The techniques for determining these physical constants of the system are described and analyzed in this report, and the results of one determination of the constants are used for illustration.