What is a hearing aid?
A hearing aid is a battery-powered, electronic device that makes listening easier for people with a hearing loss. A hearing aid consists of a microphone, an amplifier and a receiver. The microphone picks up sounds in your acoustic environment and turns them into electronic signals. The amplifier selectively amplifies the acoustic electronic signals. The receiver is a very small speaker that changes the electric signals back to sounds and delivers the sound to the ear.
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