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THE INCIDENCE OF IMPAIRED HEARING
FINDINGS FOR THE MAIN RESEARCH GROUP
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aetiology age of onset articulation of speech ascertainment attached to ordinary attending ordinary schools attending special schools audiogram audiologist audiology clinics audiometric testing average hearing impairment better ear Cause of Deafness cent Cheshire child with impaired children attending ordinary children in ordinary children issued children with defective children with hearing children with impaired comprehension of spoken deaf and partially defective hearing degree of hearing Education in Scotland educational attainments educational retardation given Grade III handicap Head teacher hearing aids hearing for speech impaired hearing impairment over 30 incidence intelligence issued with hearing Kernicterus lipreading M.J. Word Lists Medresco ment normal number of children obtained onset of deafness otitis media parents partially deaf children peripatetic teachers placement Principal School problems pure tone recommended Report school age School Medical Officer school visiting social adjustment speech development spoken language Table testing of hearing Understanding of spoken University of Manchester whilst