Hearing Loss

Different Types of Hearing Loss

The hearing loss could be of different types due to involvement of different parts of hearing system. During the hearing testing, the audiologist tries to locate the damage to exact part of the hearing system. Based on this diagnosis, he or she can suggestion different treatment options. Basically there are four types of hearingloss,i.e. Sensorineural Hearing Loss, Conductive Hearing Loss, Mixed Hearing Loss & Central Hearing Loss.

Sensorineural Hearing Loss
Sensorineural hearing loss is caused by a problem in the cochlea and/or hearing nerve.
The most common causes of sensorineural hearing loss are genetic conditions, age-related changes, and damage from noise exposure. Most hearing aid wearers have sensorineural hearing loss. This type of hearing loss is frequently not medically or surgically treatable. It is typically permanent and irreversible. However, most people with sensorineural loss get significant benefit by wearing hearing aids.
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Conductive Hearing Loss

Inner Ear Conductive

Mixed Hearing Loss
Mixed hearing loss is a combination of both conductive and sensorineural hearing loss. Examples would include a child born with sensorineural hearing loss who also has an ear infection. In such conditions, it is advisable to treat the conductive hearing loss as well as the sensorineural hearing loss.
outer ear - middle ear - inner ear diagram

Central Hearing Loss
A central hearing loss occurs when a person has normal hearing but his or her brain cannot accurately process sound. In this type the brain cannot make sense of what the ears hear because the auditory signal is distorted in some way. This type of hearing loss is also called Auditory Processing Disorder (APD).A series of specialized tests have to be performed to diagnose this condition. This condition is more prevalent in school-aged children and they may be misdiagnosed as ADD/ADHD or a learning disorder. Treatment of this disease is done through a combination of sound systems, sound rehabilitation, and communication therapy.