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  • Title: A theoretical analysis of a piezoelectric ultrasound device with an active matching layer.
    Author: Mulholland AJ, O'Leary RL, Ramadas N, Parr A, Troge A, Pethrick RA, Hayward G.
    Journal: Ultrasonics; 2007 Dec; 47(1-4):102-10. PubMed ID: 17892890.
    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.
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