Collection and Characterization of Objective Measures to Explore the Specificity of Algorithms

Inclusion Criteria: * Candidate for cochlear implantation with the CI532 or CI512 devices * 18 years of age or older at the time of enrolment * Normal cochlea anatomy, established via pre-operative Computer Tomography * Willingness to participate in and to comply with all requirements of the protocol Exclusion Criteria: * Prior cochlear implantation in the ear to be implanted * Ossification or any other cochlear anomaly that might prevent complete insertion of the electrode array * Abnormal cochlear anatomy on pre-operative Computer Tomography or Magnetic Resonance Imaging * Additional handicaps that would prevent participation in evaluations * Pregnant and breast feeding women, prisoners, or anyone in custody * Unrealistic expectations on the part of the subject, regarding the possible benefits, risks and limitations that are inherent to the procedure