Abstract
A mathematical model has been developed for evaluating the complex‐valued sound speed in transducer materials. The associated measurement scheme employs a symmetrical longitudinal vibrator, wherein the preloaded test specimen constitutes the central piece of the test resonator. By impacting the test resonator, its resonance frequency and mechanical Q can be determined using a spectrum analyzer and vibration pickup. The mathematical model of the composite longitudinal vibrator‐type test resonator facilitates the evaluation of the sound speed in the test sample from the measured resonance frequency and Qm. Experimental results are presented for several materials, with the measured sound speeds given as a function of prestress and temperature.
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