الفهرس 
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Abstract
A cochlear implant is an electronic hearing device which is surgically implanted. The first part of the device is a microphone or transmitter, which is worn externally to pick up sounds. The second part is the receiver and electrode system, which is implanted under the skin. Unlike a hearing aid, a cochlear implant does not amplify sounds Cochlear implants bypass damaged portions of the ear and directly stimulate the auditory nerve. Signals generated by the implant are sent by way of the auditory nerve to the brain. The brain recognizes the signals as sound. Hearing through a cochlear implant is different from normal hearing and takes time to learn or relearn.
The aim of this study is to assess the progress in all aspects of language acquisition and the effect of various factors on the outcome of cochlear implantation in children undergoing auditory training for at least two years after surgery.
The study was conducted on 33 children with cochlear implantation undergoing auditory training at the Unit of Phoniatrics, in the outpatient clinic of Alexandria Main University hospital; within the period of six months starting 1/7/2019.
The subjects of the study were assessed before and after implantation by a set protocol of assessment including:
Elementary diagnostic procedures
History taking:
Audiological evaluation (Pure tone audiometry).
Lip reading and sound detection, Auditory perceptual assessment (APA) to obtain:
• Levels of receptive language skills (RLS GM).
• Levels of Expressive language skills (ELS GM).
• Categories of auditory performance (CAP).
• Speech intelligibility rating criteria (SIR).
Speech and language rehabilitation prior to implantation: (Duration, and Regularity).
Clinical diagnostic procedures
Formal language testing.
Psychometric evaluation.
Post Cochlear implantation Child will be reassessed using same protocol same as pre-Cochlear implantation in addition to:
Operative history.
Speech and language rehabilitation after implantation: (Place, Duration, Regularity, Number of sessions, and type of parents’ involvement; active / passive involvement; and their commitment to required tasks).
The results showed the effectiveness of Early Implantation in terms of improvement in linguistic skills, indicated by language age scores when compared before and after surgery, degree of hearing level improvement, in addition to its effect on improving the general IQ and abstract IQ scores