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A microphone, colloquially nicknamed mic or mike (/ËmaÉªk/), is a transducer that converts sound into an electrical signal.
A speaker is someone who delivers a speech or a device that makes sounds louder. The speaker gave a great speech but you couldn't hear it because the speaker was turned off. Speaker has a few different meanings, from the person who addresses a group, to the piece of equipment that amplifies sound to someone who is fluent in a particular language. For example, a native Spanish speaker can usually tell if someone learned the language in high school because textbooks don't always include the slang and idioms of everyday speech.