Your hearing aid’s
parts and controls

Every hearing aid has four key components. See what they are and learn about other common parts and controls.

Custom Hearing Aids

Custom hearing aids are individually made for each person by taking earmold impressions and then building the hearing aid to fit the wearer’s unique ear shape. They come in a variety of sizes, from sizes that hide completely inside the ear to sizes that rest snugly in the outer ear.

Diagram showing a custom in-the-ear hearing aid from different angles

1 Microphone

2 Charging Contacts

3 Vent

4 Sound Outlet

5 Multifunction Button (Optional)

6 Rotary Volume Control (Optional)

7 Battery Door