Hearing aids are small electronic devices that you select with the help of your hearing professional. They are worn in or behind your ear. They amplify sound so that a person with hearing loss can listen, communicate, and participate more fully in daily activities. Hearing aids can help people hear better in both quiet and noisy situations. However, only about one out of five people who would benefit from a hearing aid actually use one.
A hearing aid has three basic parts: the microphone, amplifier and receiver (speaker). The hearing aid receives sound through the microphone, which converts the sound waves to electrical signals and sends them to the amplifier. The amplifier increases the power of the signals and then sends them to the ear through the receiver.