Pressure tolerant transducer

摘要

A transducer is provided comprising a layer of active material and a backing plate (110). The backing plate (110) has first and second major surfaces. A layer (111) of active material is affixed to the first surface. The transducer also includes a region adjacent to the second major surface into which region the backing plate (110) can be deflected. The region is substantially isolated from any external pressure incident on the layer of active material. Moreover, the backing plate (110) and/or layer of active material (111) is of a non-uniform thickness. Preferably, the backing plate (110) is thicker at a central region thereof than at an edge region thereof.