Hearing aids are electronic devices that amplify sound for people with hearing loss. They consist of a microphone that picks up sounds and converts them to electronic signals, an amplifier that increases the power of the signals, and a receiver that delivers the amplified sounds into the ear. There are different types of hearing aids including behind-the-ear, on-the-ear, in-the-ear canal, and bone-anchored options. Nurses play a role in helping patients understand how to use and care for their hearing aids.