What are the types of hearing loss?
Conductive hearing loss
Causes of conductive hearing loss
Sensorineural hearing loss
Causes of sensorineural hearing loss


What are the types of hearing loss?

There are two main types of hearing loss: Conductive Hearing Loss and Sensorineural Hearing Loss

Conductive hearing loss

A conductive hearing impairment is caused by disorders of the outer and/or middle ear. These hearing losses are usually temporary and can sometimes be reduced or eliminated by medical intervention or surgery.

Common causes of conductive hearing loss:

Middle ear infections
A perforated eardrum
Earwax in the ear canal
Unusual bone growth (otosclerosis)
Fluid in the middle ear ("glue ear" in children)
Head injury.

Sensorineural hearing loss

A sensorineural hearing impairment is one resulting from dysfunction in the inner ear, especially the cochlea where sound vibrations are converted into brain signals, or in any part of the brain that subsequently processes these signals. In many cases, sensorineural hearing loss is permanent and may affect both ears.

Causes of sensorineural hearing loss

Sensorineural deafness can be present at birth (congenital), most often due to genetic syndromes, or it can be acquired in childhood or later in life as a result of:

Age-related hearing loss (Presbycusis)
Disease of the blood vessels (vascular disease)
Immune disease
Stroke
Infections, such as meningitis, mumps, scarlet fever, and measles
Injury
Loud noises or sounds, or loud sounds that last for a long time
Ménière's disease
Tumour, such as acoustic neuroma