Title: Sonar Transducer Calibration in a Controlled Pressure‐Temperature Environment
Abstract: It is known that both temperature and pressure affect the performance of most sonar transducers. A system has been installed at the Transdec facility of the Undersea Warfare Center, San Diego Division, so that a transducer can be subjected to controlled temperature from 40° to 90° F and/or pressure from 0 to 2000 psi during calibration. The transducer to be calibrated is mounted inside an acoustically transparent vessel 3 ft in diameter by 6 ft long. Water is circulated through the vessel and through a deck-mounted refrigerating-heating unit. A standard transducer known by other means to be independent of temperature and pressure shows no pattern or response deterioration when checked in the vessel. Examples will be presented that demonstrate the changes in performance in other transducer due to variations in temperature and pressure.