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A microphone, colloquially nicknamed mic or mike (/ËmaÉªk/), is a transducer that converts sound into an electrical signal.
Hearing aids have a microphone to pick up sound, an amplifier to make sound louder, and a receiver that sends the sound into the ear canal. In modern digital aids, microphones transmit sound to a computer chip, which adjusts the volume and amplifies the sound frequencies needed to help improve your hearing.