The Effect of Anatomy-based Fitting on the Perception of Speech in Noise and Music in Single-sided Deaf Cochlear Implant Users

Inclusion Criteria: * Age ≥ 18 years * Post-lingual onset of unilateral severe-to-profound sensorineural hearing loss * Contralateral hearing \< 30 dB HL (PTA measured at 500Hz, 1kHz, 2kHz en 4 kHz) * Post-operative Computed Tomography (CT) scan of the CI elec-trode available * Subject implanted with MED-EL cochlear implant(s) * Subjects received a Flex20, Flex24, Flex28, FlexSoft, Flex34 or Standard electrode * Subject planned to receive a SONNET 2, SONNET 3 or RONDO 3 audio processor on the newly implanted side * Newly implanted CI users * The most apical active electrode contact has to be inserted at least 540° * Minimum of 10 active channels can be activated * Fluent in the language of the test centre * Signed and dated Informed Consent Form (ICF) before the start of any study-specific procedure Exclusion Criteria: * Lack of compliance with any inclusion criteria * 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