There are three main types of hearing loss and each can be caused by different factors and require different hearing aid technology and features to have the best listening experience. The three types of hearing loss include:
1. Sensorineural hearing loss: When the problem is in the inner ear or a problem with the auditory nerve, a sensorineural hearing loss is the result. This commonly occurs from damage to the small hair cells, or nerve fibers, in the auditory system. Sensorineural hearing loss is the most common type of hearing loss in adults and accounts for more than 90 percent of hearing loss in all hearing aid wearers. The most common causes of this hearing loss are age-related changes and noise exposure. Loss may also result from disturbance of inner ear circulation, increased inner ear fluid pressure, or from disturbances of nerve transmission. There are many excellent options for the patient with sensorineural hearing loss.
2. Conductive hearing loss: When there is a problem in the external or middle ear, a conductive hearing loss occurs. Conductive hearing loss develops when sound is not conducted efficiently through the ear canal, eardrum, or tiny bones of the middle ear, resulting in a reduction of the loudness of sound that is heard. Conductive losses may result from earwax blocking the ear canal, fluid in the middle ear, middle ear infection, obstruction of the ear canal, perforation (hole) in the eardrum membrane or disease of any of the three middle ear bones. Individuals with conductive hearing loss can benefit from hearing aids, medical implants, medication or surgical options.
3. Mixed hearing loss: When there are problems in the middle and inner ear, a mixed hearing impairment is the result. Because mixed hearing loss involves both sensorineural and conductive hearing loss, treatment options from hearing aids to surgery depends on the nature of the impairment and the symptoms experienced.