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Abstract
Piezoelectric composites consisting of an active ceramic component and a passive component are briefly reviewed and current interest in ‘macrocomposites’, in which the components are combined on a scale which permits design of regular geometrical arrangements, are discussed. The potential for compact sound sources employing bimorth or biceramic composite stacks is examined and the force, deflection, electromechanical coupling and resonance frequencies for bimorth elements and simple stacks are presented. Potential advantages and limitations of these macrocomposite structures are considered.