Single-element transducers are often the most cost-effective option for signal generation and sensing applications, while multiple ceramic element transducers are best-suited for high power or large displacement applications.
Transduction refers to the conversion of energy from one form to another. In terms of piezoelectric transducers, it means the conversion of electrical to mechanical energy and/or vice-versa. This is made possible by the inclusion of active piezoceramic components in the transducer, and can take place in a variety of mediums (e.g., air, liquid, etc.) using a variety of transducer designs.