Investigating the Neural Oscillatory Features for Limited Access to Oral Language in Deaf Children With Early Bilateral Cochlear Implantation

Inclusion Criteria: * Between 4 and 17 years old at time of inclusion * Age of first implantation less than or equal to 30 months * Bilateral CIs * Received CIs simultaneously or sequentially (the interval between two implantations does not exceed 18 months) * Congenital severe-to-profound hearing loss (PTA ≥90 dB HL) Exclusion Criteria: * Children with severe associated disabilities who are assessed as unable to complete the tasks * Patients who, in the medical opinion of the Investigator, are unlikely to comply with the study protocol