There are 3 main types of hearing loss:
Conductive hearing loss
In conductive hearing loss sounds are unable to pass from your outer ear to your inner ear, usually as a result from a blockage. This can be wax in the ear canal, or it can be fluid in the middle part of the ear. It can also be as a result of a perforated eardrum or a problem with the hearing bones. A conductive hearing loss can often be resolved through surgical or medical means. Hearing aids are very effective in treating conductive losses.
Sensorineural hearing loss
In sensorineural hearing loss, the damage is in the inner part of the ear, in the cochlea. It can be caused by the ageing process, excessive noise exposure, genetic predisposition, certain diseases and viruses. Sensorineural hearing loss is permanent. Hearing aids are effective is treating most sensorineural hearing losses.
Mixed hearing loss
Mixed hearing loss is a combination of both conductive and sensorineural hearing loss.