A new model of the piezoelectric ultrasonic transducer

A new model for piezoelectric ultrasonic transducers is proposed. It is derived from the fundamental piezoelectric equations and it has the following features: i) It is valid over a wide range of frequencies. ii) It is applicable in both transmission and reception modes. iii) It involves realizable elements which are readily simulated. iv) It involves feedback mechanisms which clearly relate pressure and voltage interactions. The model has been widely investigated using computer simulation, water tank measurements and photo -elastic visualisation studies using glass models. Some of the results of such investigations are presented.