EDSP 2100 Lecture Notes - Lecture 9: Meningitis, Manually Coded English, Cytomegalovirus

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Definitions: deafness is having a hearing loss that is so severe that the child has difficulty processing linguistic information through hearing, with or without amplification, that adversely affects educational performance. How we hear: audition is complex and not completely understood process, the outer ear is the eternal ear and auditory canal. Auricle funnels sound waves into the auditory canal and helps distinguish the direction of sound. Sound waves are amplified as they move towards the tympanic membrane. Variations in sound waves cause the eardrum to move in and out. The nature of sound: sound is measure in units that describe its intensity and frequency. Describes (db): intensity or loudness of sound. Zero db represents the smallest sound a person with normal hearing can perceive. Sounds of 125 db or louder cause pain to most persons: hertz (hz) is the frequency of pitch of sound is measured in cycles peers second. Pure tones consist of one frequency only.

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