Some hearing aids have a volume control (increases or decreases the volume of the sound) or a program button.Īll hearing aids use the same basic parts to carry sounds from the environment into your ear and make them louder. Hearing aids use these parts to help pick up and amplify sound from your environment and channel it into your ear: microphone (detects the sound), amplifier (makes the sound stronger), speaker (sends the sound into your ear so that you can hear it), battery (provides power to the electronic parts).
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