It can also be hereditary, caused by a head injury, infection, illness; certain drugs can also cause this. And it can be caused by circulation problems like high blood pressure (Karmody, 1983).
There are many different terms used in hearing loss such as, bilateral and unilateral hearing loss. Bilateral hearing loss is when both ears are affected. Unilateral hearing loss is when only one ear is affected. Symmetrical and asymmetrical hearing losses are some of the many. Symmetrical hearing loss means that the degree or amount of hearing loss is the same in both ears. An asymmetrical hearing loss is when the degree or amount of hearing loss is different in each ear. Progressive and sudden hearing losses are also two types. Progressive hearing loss is when hearing loss becomes increasingly worse over time. A sudden hearing loss is when an acute or rapid onset and therefore occurs quickly. This requires immediate medical attention to determine the cause and treatment. The last two are fluctuating and stable hearing loss. Well hearing losses change, sometimes getting better, sometimes getting worse. Fluctuating hearing loss is typically a symptom of conductive hearing loss. This is caused by ear infection and middle ear fluid, but also presents in other conditions such as Menierels disease (ASHA, 2000).
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