[Special schools for deaf children. Their status of hearing, speech and clinical history].

170 deaf school children were described with respect to the following conditions: depth of the hearing impairment, phonic speech ability and lip reading possibility. The anamnesis data were also analyzed. All children disclosed a profound hearing impairment. 60 from 170 (35%) had deaf parents. The phonic speech ability was possessed in an unsufficient degree by only 128 (75%) children. 69 (40%) children passed 3 years of speech and hearing rehabilitation before entering the school. 58 (34%) showed good lip reading ability.