RESUMEN
The aim of this study is determine the auditory performance of congenitally deaf children following cochlear implantation and comparisons of auditory performance before and after cochlear implantation. This is a prospective study of 53 children having been implanted in khorasan center, and followed for 5 years. All children are aged less than 8 years at the time of implantation the mean of age at implantation is 42 months. Auditory performance is assessed by using the Categories of Auditory Performance scale [CAP]. Prelingually deaf children showed significant improvement in the auditory performance with implant experience. Six-month after implantation 91% of children could rassed to speech sound 96% could discriminate speech sounds at the 12 month interval. 80% of children who reaches the three year interval could understand common phrases without lip reading. These results indicate the ability of cochlear implants to provide significant auditory skills for young congenital deaf children