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Experimental and Theoretical Comparison of Ultrasonic Transducer Fields

A comparison is presented between the pressure fields of piezoelectric transducers measured experimentally, and those predicted theoretically at a single frequency. For PZT transducers, it will be shown that a good correlation results only when non-uniform vibrational characteristics across the transducer face are input to the theory. Conversely, PVDF transducers constructed by the authors seem to follow plane piston-type behaviour.