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.

Behind-The-Ear (BTE)

A BTE hearing aid houses the hearing components in a casing that rests behind the ear. A clear plastic acoustical tube directs amplified sound into an earbud or a customized earmold that is fitted inside the ear canal. BTEs are the world’s most common hearing aid, are typically the biggest, and are available in standard, mini or power.

Diagram showing a behind-the-ear hearing aid from different angles

1 Hearing Aid Shell

2 Ear Hook

3 Microphone

4 Rocker Switch (user control)

5 Left/Right Indicator

6 Battery Door

7 Manufactuer & Model Name

8 Charging Contacts