A device for converting a physical effect into an electrical signal or the other way around.
For example a microphone is a transducer that converts sound into an electrical audio signal. So in this case it converts sound-to-electrical
A loudspeaker on the other hand is also a 'transducer' as it converts an electrical signal (audio) into a physical effect (sound). So in this case it converts electrical-to-sound
Challenge see if you can find out one extra fact on this topic that we haven't already told you
Click on this link: Transducer