the.com/transducer
A bilingual device that translates one kind of energy into the language of another.
means A component that converts one form of energy or signal into another, like sound into electricity or pressure into voltage.
from From Latin transducere, to lead across — joining trans (across) and ducere (to lead), the same root behind aqueduct and conductor.
Your earsBiological transducers turning air pressure into nerve signals.
Microphone dutySound waves in, electrical wiggles out.
Two-way streetSpeakers do the same trick in reverse.
UltrasoundSame transducer sends pings and hears echoes.