Design of a laterally radiating piezoelectric actuator to provide a high volume velocity

摘要

A new method describing the low frequency behaviour of a piezoelectric laterally radiating loudspeaker is presented here. The loudspeaker, consisting of several concentric cylindrical membranes separated by rigid cylinders, can provide a high volume velocity in the low frequency range and a high level of pressure. These properties are suitable for active noise control. The model, consisting of a system of interconnected channels of acoustical signal transformation can be used to calculate the characteristicts of this kind of transducers. The objective here is to present this low frequency mathematical model and to show that the model agrees well with experimental observations and that it is useful in parametric analyses.