Hearing Impairment Report
Introduction
Children with hearing impairment will face various obstacles around communication and thus affecting their learning performance. Hearing-impaired students, educational consideration and relative Hong Kong situation of hearing impairment will be the main focus in this paper.
Hearing impairment is a disorder in any part of an auditory system, which can affect one’s hearing, speech and communication abilities. The person’s hearing threshold who are hearing-impaired is above the normal range of -10 to 15 decibels. The hearing ability cannot be restored once it is damaged (Education Bureau, 2015). Overall, hearing impairment contains three types of hearing loss. The first type is a conductive hearing loss. If the person has this type
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It consisted two part,the congenital hearing loss and the acquired hearing loss.
Congenital hearing loss
Congenital hearing loss refers to the hearing loss at birth. It might due to the genetic or nongenetic factors.
The hereditary are thought to cause more than 50% of all hearing loss. Genetic defects in hearing loss can be present at birth or develop later on. (American Speech-Language-Hearing Association, n.d.）Hearing deficits can be inherited in these 4 ways, including Mitochondrial pattern of inheritance,X-link,Autosomal dominant, Autosomal recessive.(See Appendix 1)
Nongenetic factors can bring about 25% of congenital hearing loss. Nongenetic factors cause congenital hearing loss because of the maternal infections, such as cytomegalovirus, rubella (German measles), Prematurity, herpes simplex virus, birth injuries and low birth weight. Also, the toxins absorbed by the fetus is a reason for causing the congenital hearing loss.The toxic substances including drugs and alcohol.These substances digest by the mother during pregnancy and afferent to the fetus. Complications associated with the Rh factor in the blood/jaundice, toxemia during pregnancy and Lack of oxygen (anoxia) and maternal diabetes (American Speech-Language-Hearing
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The hearing loss might occur any time in one's life because of the illness or injury. The ear infection (see appendix 2 ) is an example of conditions for causing the acquired hearing loss in children.It is very common during childhood.It happens when the middle ear have the inflammation. It can be painful.
Second is the toxic medications to the ear. Some medications can harm for the ear and causing for hearing loss, ringing in the ear or balance disorders. These drugs are considered ototoxic.(American Speech-Language-Hearing Association）
Other examples are Measles,Meningitis,Chickenpox,Encephalitis,Noise exposure,Flu,Head injury,Mump. These are the causes of hearing impairment.
Student with hearing impairment have faced a lot of obstacle in the daily lives. To deepen the understanding for them, At the following part, we would like to talk about the characteristic of this kind of
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