There are two types of hearing loss.
One is known as Sensori-Neural Hearing Loss (SNHL) and the other is Conductive Hearing Loss (CHL).
SNHL relates to any hearing loss related to the ear nerve or pathways to and from the brain and is commonly called nerve loss.
CHL refers to any disorder which interferes with the conduction of sound waves to the inner ear.
Nerve loss can be the result of degeneration of the cochlea -- the inner ear -- the auditory nerve as a result of noise trauma,
tumor, vascular insufficiencies, or other neurological disorder that negatively impact the neural pathways.
Conductive hearing loss is attributed to anything that impedes the sound wave from getting to the inner ear.
This may be as simple as wax blocking the ear canal and ear drum, or complicated by diseases such as Otosclerosis
– an over-growth of the cochlear bone – which impedes the motion of the Stapes bone. The Stapes bone functions as
a piston that transports the sound wave from the ear drum though the middle ear into the inner ear.
The most common cause of hearing loss is Sensori-Neural.