Deafness refers to improper hearing.
Deafness refers to an inability to hear at a normal level. There are several degrees of deafness ranging from those who are hard of hearing, to those who can not hear at all. Although there are two main types of deafness, some people exhibit both types.
Conductive Deafness
Conductive deafness refers to sound waves not being able to pass into the other parts of the ear; it is most commonly caused by fluid build-up, and is sometimes a temporary condition.
Sensori-neural Deafness
Sensori-neural deafness is described as a defect in the inner ear or auditory nerve that results in permanent deafness.
Prenatal Causes
It is difficult to determine why children are born deaf, though it is believed to be caused by genetic defects or complicated pregnancies.
Prematurity
Premature babies have a higher rate of deafness because they often develop infections and their bodies are not fully developed.
Illness
The Centers for Disease Control and Prevention (CDC) note that some causes of hearing loss can be prevented by getting vaccines for illnesses such as rubella, meningitis, and measles. Frequent ear infections can cause the ear drum to burst or become perforated and may contribute to hearing loss.
Injuries
Bursts of loud noises, as well as repeated exposure to loud noises, can damage the delicate hairs inside the ear and cause hearing loss. Head trauma can also result in a degree of deafness; early symptoms include a buzzing or ringing sound in the ear. Hearing loss may be permanent or temporary.
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