Types of Hearing Loss
Conductive Hearing Loss
Conductive hearing loss occurs when sound is not conducted efficiently through the outer ear canal to the eardrum and the tiny bones (ossicles) of the middle ear. Conductive hearing loss usually involves a reduction in sound level or the ability to hear faint sounds. This type of hearing loss can often be corrected medically or surgically.
Some possible causes:
Fluid in the middle ear from colds
Ear infection (otitis media)
Allergies (serous otitis media)
Poor eustachian tube function
Impacted earwax (cerumen)
Infection in the ear canal (external otitis)
Swimmer’s Ear (otitis ecxterna)
Presence of a foreign body
Absence or malformation of the outer ear, ear canal, or middle ear
Sensorineural Hearing Loss
Sensorineural hearing loss (SNHL) occurs when there is damage to the inner ear (cochlea), or to the nerve pathways from the inner ear to the brain. Most of the time, SNHL cannot be medically or surgically corrected. This is the most common type of permanent hearing loss.
SNHL reduces the ability to hear faint sounds. Even when speech is loud enough to hear, it may still be unclear or sound muffled.
Some possible causes of SNHL:
Drugs that are toxic to hearing
Hearing loss that runs in the family (genetic or hereditary)
Malformation of the inner ear
Exposure to loud noise
Mixed Hearing Loss
Sometimes a conductive hearing loss occurs in combination with a sensorineural hearing loss (SNHL). In other words, there may be damage in the outer or middle ear and in the inner ear (cochlea) or auditory nerve. When this occurs, the hearing loss is referred to as a mixed hearing loss. – See more at: http://www.asha.org/public/hearing/Mixed-Hearing-Loss/#sthash.MFh8ItvQ.dpuf
Sometimes a conductive hearing loss occurs in combination with a sensorineural hearing loss (SNHL). In other words, there may be damage in the outer or middle ear and in the inner ear (cochlea) or auditory nerve. When this occurs, the hearing loss is referred to as a mixed hearing loss.
Call Sonus in Harrisburg to make an appointment for a diagnostic hearing evaluation.
Visit the American-Speech-Language-Hearing Association for more information.