Retrospective Analysis of Speech Performance Using the HiRes Ultra and HiRes Ultra 3D Cochlear Implant
This is a retrospective study designed to collect speech perception results for HiRes Ultra CI and HiRes Ultra 3D CI users as measured in the clinical routine and to confirm the performance of these devices.
- EligibilityCriteria: Inclusion Criteria:  Unilateral or bilateral HiRes Ultra CI or HiRes Ultra 3D CI users including  Ultra Version V2 newly implanted on this side (Group 1) Ultra Version V2 users implanted following an Ultra Version V1 device failure in the same ear (Group 2) Informed consent signed  Exclusion Criteria:  no exclusion criteria - HealthyVolunteers: No - Gender: All - StdAgeList: Child, Adult, Older Adult - StudyPopulation: The studied population consists of all CI users implanted with a HiRes Ultra Version V2 or HiRes Ultra 3D Version V2 CI at the Medical University of Hannover in Germany (MHH). - SamplingMethod: Non-Probability Sample