A megaphone is a self-contained device that amplifies the voice, the simplest example being one of those cone-shaped horns. A microphone on the other hand converts the voice into an electric signal, which you then have to connect to another separate device if you want to amplify it.
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Answer:
A megaphone is a self-contained device that amplifies the voice, the simplest example being one of those cone-shaped horns. A microphone on the other hand converts the voice into an electric signal, which you then have to connect to another separate device if you want to amplify it.