A design of an ultrasonic apparatus for testing material samples is presented. It is based on a pulse-echo technique and involves wave reflection and refraction at a liquid-solid interface. The main part of the apparatus is a transducercell, which holds the sample under test (SUT). The novelty of the design resides in the use of prism-shaped specimens and the special configuration of the transducer cell, that allows for the simple generation of both longitudinal and shear waves within the material using just one transducer. Wave velocities are derived from a special formula, which represents a significant improvement over an earlier version of the apparatus designed by the author.
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Abdelmalek Bouhadjera (2004) studied this question.
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