SPED 2231 Chapter Notes - Chapter 14: Outer Ear, Inner Ear, Decibel
8 Jan 2019
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Deaf - a person must have a hearing loss of 70 to 90 decibels or greater and be unable to use hearing, even with amplification. Hard of hearing - has a hearing loss in the 20 to 70 decibel range. Congenital deafness - hearing loss present at birth - low incidence disability affecting a small number of people. Deaf community - believes that the term impaired has negative connotations and prefers deaf child (?) Resist the term hearing impaired because it implies a condition in need of correction or repair. 1. 2 percent of total population of students ages three to twenty one with disabilities served under idea. Conversational speech is 45 db - 50 db. A shout can be as loud as 70 db. Outer ear consists of the auricle, or pinna and the ear canal. Vibrating air molecules hit the eardrum and cause it to vibrate.
