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A theoretical analysis of a piezoelectric ultrasound device with an active matching layer

Mulholland, A. and Ramadas, S.N. and O'Leary, R.L. and Parr, A.C.S. and Troge, A. and Hayward, G. and Pethrick, R.A. (2007) A theoretical analysis of a piezoelectric ultrasound device with an active matching layer. Ultrasonics, 47 (1). pp. 102-110. ISSN 0041-624X

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Abstract

This paper investigates the use of magnetically active materials in the matching layer of a piezoelectric transducer. This then allows the performance of the device to be dynamically altered by applying an external field. The effect that this new matching layer has on the performance of a typical device is theoretically investigated here. It transpires that the additional flexibility of an active matching layer can be used to maintain the efficiency of the device as the external load is varied.