Abstract
Previously, ∗1 we presented a theory to explain the resonant behaviour of a couplant/multilayer acoustic emission transducer system. Here we present experiments used to verify the applicability of the theory in describing the behaviour of such a system. An acoustic emission transducer/couplant system is typically five layers; but to obtain agreement between theory and experiment, it was necessary to extend the theory to six layers and carry out six-layer measurements. Agreement between theory and experiment is quite good and we believe that this theory provides a basis for a better understanding of the effect of couplant thickness on measured acoustic emission parameters. In the longer term, this will produce greater measurement precision and more effective interpretation of data.
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