Anatomy-based Fitting in Unexperienced Cochlear Implant Users

Inclusion Criteria: * Post-lingual onset of severe to profound sensory-neural hearing loss in the implanted ear(s) * Post-OP CT scan of the CI electrode available * Subject implanted with MED-EL cochlear implant(s) * Subjects received a Flex28, FlexSoft and Standard electrode * Subject planned to receive a SONNET 2 or RONDO 3 audio processor on the newly implanted side * Audio processor not yet activated on the newly implanted side * The most apical active electrode contact has to be inserted at least 450° * Minimum of 10 active channels can be activated * Fluent in the language of the test centre * Signed and dated ICF before the start of any study-specific procedure Exclusion Criteria: * Lack of compliance with any inclusion criteria * EAS user (user of an EAS audio processor) * Implanted with C40+, C40X and C40C * Implanted with an ABI or Split electrode array * Anything that, in the opinion of the Investigator, would place the subject at increased risk or preclude the subject's full compliance with or completion of the study