(from the article `electromechanical transducer`) any type of device that either converts an electrical signal into sound waves (as in a loudspeaker) or converts a sound wave into an electrical ... A major step in the development of sonar systems was the invention of the acoustic transducer and the design of efficient acoustic projector...
Found on
http://www.britannica.com/eb/a-z/e/19
transducer designed to receive an electric input signal and to furnish an acoustic output signal, or vice versa
Found on
http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=801-25-47
No exact match found.
