Abstract
A system to provide rapid, reliable, economical calibration of small hydrophones is described. The system is designed for production testing and field use in the frequency range of 100 cps to 3 kc. The hydrophone is placed in an open-ended column of water which is excited by an electrodynamic driver. Acoustic pressure in the tube is calculated from system parameters and compared to measured results for various types of hydrophones. Results agree with open-water data within ±1.0 db.
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