Credentia California CNA Practice Test

Hearing aid is the device that fits in or on the ear to amplify sound. These small electronic devices are worn behind or inside the ear and use a microphone to pick up sound, an amplifier to boost it, and a speaker to deliver the louder sound into the ear, helping many people hear speech more clearly without surgery. Other options involve implants placed inside the body, such as cochlear implants, which are surgically implanted and not worn on the ear. The term auditory prosthesis is a broad label that can include various devices, not specifically the wearable aid described.