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A microphone, colloquially nicknamed mic or mike (/ËmaÉªk/), is a transducer that converts sound into an electrical signal.
The word microphone comes from the Greek words micro, meaning small, and phone meaning voice. It first appeared in a dictionary in 1683 as an instrument by which small sounds are intensified.This was in reference to acoustical hearing devices such as the ear trumpets and megaphones of that era.