Sensitivity of piezoelectric transducers

A theoretical analysis based on an established transducer model has revealed a mathematical expression for sensitivity (e.g., volts. per unit signal force) of piezoelectric plate transducer operating in its thickness modeand air as its surrounding medium. The sensitivity is found to be a strong function of frequency, with the principal peak being at the plate's fundamental thickness resonance. Other peaks of sensitivity are found to be at the odd multiples of this fundamental resonance frequency, whereas at even multiples of this frequency, the sensitivity is practically zero.