Abstract
Application of air-coupled ultrasonic measurements is problematic due big acoustic transduction losses of conventional ultrasonic air-coupled transducers. One of the ways to solve this problem is application of more efficient ultrasonic transducers made of PMN-32 %PT crystals. The objective of this work was development of novel effective air-coupled ultrasonic transducer with PMN-32% PT crystal plates. The high electromechanical factor of the transverse extension mode enables to achieve a good performance of air-coupled transducers. The developed and investigated ultrasonic transducer possesses in a transmission mode 10 times better efficiency than a PZT composite ultrasonic transducer.
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