Transducer 03
Transducer 03 : (ICT) 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