JT Teaching Supplies :: Special Education :: Deaf and Hard Of Hearing

"Hearing Impairment" means an impairment in hearing, whether permanent or fluctuating, that adversely affects a child’s educational performance, but is not included in the following definition for deafness. "Deafness" means a hearing impairment that is so severe that the child is impaired in processing linguistic information through hearing, with or without amplification, that adversely affects a child’s educational performance.

 

Source:  http://www.ssd.k12.mo.us/Parents/disability_categories/hearing_impair.html