Thickness Measurement by Ultrasonic Resonance

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Abstract
A mathematical analysis made of the acoustic system of resonance-type instruments used for thickness measurements from one side only. The approach is general and can be used to evaluate any combinations of test sample, couplant, and driving crystal provided their acoustic properties are known. Correlation between the theory and experimental data is discussed. The results of the analysis have been used to compute thickness calibration screens and tolerances on components for a specified testing problem.

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