Hearing aid

A hearing aid is a small electrical machine which fits in or behind a person's ear. The purpose of a hearing aid is to make sounds louder so the deaf person can hear spoken words and other sounds.
The two most common types of modern hearing aids are "behind the ear aids" and "in the ear aids".
Before hearing aids were invented, people used "ear trumpets" also called ear horns.
Types of hearing aids.
There are many different types of hearing aids. They are good for different users depending on lifestyle and how much help they need to hear. An audiologist can help make hearing aids work even better for a user by customising them.