| Hearing impairment is the decreased ability to hear and | | | | hearing. Hearing impaired students often learn to "feign" |
| discriminate among sounds. It is one of the most | | | | comprehension with the end result being that the |
| common birth defects. Each year in the United States, | | | | student does have optimal learning opportunities. |
| about 12,000 babies (3 in 1,000) are born with significant | | | | Therefore, facilitative strategies for hearing impaired |
| hearing impairment (1). Hearing impairment that is | | | | students are primarily concerned with various aspects |
| present at birth is called congenital hearing impairment. | | | | of communication. Other problems arise because |
| Hearing impairment also can develop later in childhood | | | | deafness is an invisible disability. |
| or during adulthood. | | | | Syndromes deafness accounts for the other cases of |
| Normal hearing thresholds are not the same for all | | | | genetic deafness. Some syndromes have a particular |
| frequencies in any species of animal. If different | | | | inheritance pattern (eg, autosomal dominant for Gernet |
| frequencies of sound are played at the same | | | | syndrome, autosomal recessive for Winter syndrome, |
| amplitude, some will be loud, and others quiet or even | | | | X linked for Rosenberg syndrome). Others are |
| completely inaudible. Generally, if the gain or amplitude | | | | sporadic (eg, cat-eye, Turner, or Klinefelter syndrome). |
| is increased, a sound is more likely to be perceived. | | | | Physical findings usually indicate the presence of a |
| Ordinarily, when animals use sound to communicate, | | | | syndrome; however, children with some syndromes |
| hearing in that type of animal is most sensitive for the | | | | develop the associated physical findings late in |
| frequencies produced by calls, or, in the case of | | | | childhood. |
| humans, speech. This tuning of hearing exists at many | | | | The ear consists of three parts - the outer ear, the |
| levels of the auditory system, all the way from the | | | | middle ear and the inner ear. The outer ear is made up |
| physical characteristics of the ear to the nerves and | | | | of the visible part of the ear on the side of your head, |
| tracts that convey the nerve impulses of the auditory | | | | the ear canals that go into your head, and the eardrum, |
| portion of the brain. | | | | a thin layer of tissue that Sep rates. It is easy for |
| It can be caused by many physical conditions (e.g., | | | | teachers to "forget about it" and treat the student as |
| childhood illnesses, pregnancy-related illnesses, injury, | | | | not having a disability. It has also been shown that |
| heredity, age, excessive or prolonged exposure to | | | | hearing impaired students with good English skills also |
| noise), and result in varying degrees of hearing loss. | | | | have good science concept formation. |
| Generally, hearing impairments are categorized as mild, | | | | Hearing loss can be inherited. Both dominant gene and |
| moderate, severe, or profound. An individual with a | | | | recessive genes exist which can cause mild to |
| moderate hearing impairment may be able to hear | | | | profound impairment. If a family has a dominant gene |
| sound, but have difficulty distinguishing specific speech | | | | for deafness it will persist across generations because |
| patterns in a conversation. Individuals with a profound | | | | it will manifest itself in the offspring even if it is inherited |
| hearing impairment may not be able to hear sounds at | | | | from only one parent. If a family had genetic hearing |
| all. | | | | impairment caused by a recessive gene it will not |
| Hearing impaired student shows an ever increasing | | | | always be apparent as it will have to be passed onto |
| gap in vocabulary growth, complex sentence | | | | offspring from both parents. |
| comprehension and construction, and in concept | | | | Read about beauty tips makeup tips. |
| formation as compared to students with normal | | | | |