Abstract
Underwater acoustic transduction has been undergoing great changes in modern device designs. After several decades of advancements in acoustic sensing technologies, current interests have included novel and application-specific designs in underwater acoustic projection. These changes are an outgrowth of advances in materials processing and manufacturing. The incorporation of newer materials is resulting in devices that are specifically tailored for individual applications as opposed to general designs that in the past have been used to cover a variety of applications. This presentation will introduce the concepts of the new materials advances, including piezocomposites, piezopolymers, electrostrictive ceramics, single crystals, hybrid piezoelectric ceramic/magnetostriction devices, and microflextensional drivers called cymbals. The state of development of these technologies will be introduced as they are being incorporated into new devices. The talk will show prototype designs and discuss future directions. [The continuing support of ONR 321 is gratefully acknowledged.]
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