This study aims at investigating new automatic fitting techniques for cochlear implant patients based on objective measures. For this reason, the evolution of these neurophysiological measures, expressing the encoding of pure tones and speech, will be characterized in cochlear implanted patients as a function of post-implantation time and will be compared to those of normal hearing subjects. Moreover, the effect of auditory training with new tools based on serious games will be assessed.

Inclusion Criteria:

• native French speaker
• no medical treatment for behavior or neurological disorders
• normal or corrected vision
• right-handed
• normal ORL examination
• valid affiliation to social security
• absence of participation to another study

For the cochlear implanted patients:

• aged from 1 to 70
• bilateral severe to profound deafness
• cochlear implant
• congenital deafness, pre or post lingual

For the normal-hearing subjects:

• Aged from 18 to 70
• Normal tonal audiometry

Exclusion Criteria:

• No signed consent
• Treatment for depression, epilepsy, Parkinson's or Alzheimer's disease
• Physical health deficiency
• Mental retardation
• Neurological or psychiatric disease incompatible with the testing procedure
• Schooling in a foreign language
• Foreign language spoken at home with both parents
• Invalid social security
• For the normal hearing subjects, no known hearing deficits