Hearing aid parts

Hearing aid with common parts labeled

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). Some hearing aids have a volume control (increases or decreases the volume of the sound) or a program button.