Correlations Between Subjective and Objective Responses to Cochlear Implant Stimulation

Observational study of adult patients who are going to receive or have received a cochlear implant. In fact, two groups of patients will be studied: Incident case cohort: patients included in the cohort will be followed for one year after surgery. Data will be collected at each postoperative follow-up visit (M1, M3, M6, M9, M12) to monitor their progress. Each objective measurement will be taken on at least three electrodes: on the left, right, and central electrodes. Data will be collected at each postoperative follow-up visit (M1, M3, M6, M9, M12) in order to monitor their progress. Each objective measurement will be taken on at least three electrodes: on the basal, median, and apical parts of the electrode array. Stimulation will be configured using the software normally used to adjust the implant. Responses are collected: * for eCAPs: via the same software * for eABRs: using an auditory evoked potential recording device synchronized with the implant stimulations * for eSRTs: using a tympanometer with the probe inserted into the external auditory canal on the same side or the opposite side to the stimulation. Cross-sectional sample of prevalent cases: The same measurements will be taken in patients who had a cochlear implant some time ago (evaluation more than one year after surgery). The measurements will be taken only once during their annual check-up. This population will enable us to compare data from patients who have recently had an implant with data from a population that already has a minimum of experience and adaptation to the implant.