H91: Other hearing loss

H91.3: Deaf mutism, not elsewhere classified

A person who is unable to hear can sometimes still sometimes pick up individual sounds or noises. Loss of hearing may be caused by disorders of the ear, the acoustic nerve, or the brain.

The ear is a sensory organ that is used to hear and to maintain one's balance. There are 3 different areas in the ear: the outer ear, middle ear and inner ear. The information about sounds and noises goes from the inner ear, via the acoustic nerves, to the brain.

Hearing and speaking are 2 closely related abilities. If a child is deaf, their speech development can be delayed or non-existent. So functioning hearing is important in being able to learn to talk.