Reciprocity calibration of hydrophones in the Megahertz frequency range [biomedical ultrasound applications]

In biomedical ultrasound, experimental work may be performed at various temperatures whereas hydrophone calibration data are typically specified at only one temperature. It is necessary to know the temperature dependence, if any, of hydrophone sensitivity. Comparison of the results of a three-transducer reciprocity calibration of an Imotec type 80-0.5-4.0 passive PVDF probe at 3°C, 15°C and 37°C to the calibration at 22°C show that within the limits of precision of this experiment, there is no difference in hydrophone sensitivity at these four temperatures.