Transducer

Active sonar transducers emit an acoustic signal or pulse of sound into the water. If an object is in the path of the sound pulse, the sound bounces off the object and returns an “echo” to the sonar transducer.

By determining the time between the emission of the sound pulse and its reception, the sonar transducer can determine the range and orientation of the object.

A microphone acts as a transducer, converting sound energy into electrical energy.

A common function of a transducer is to convert a non-electrical physical quantity, like pressure, into a measurable electrical signal.