A Study Evaluating the Application of Hearing Aid Technologies to Signal Processing for Adult Cochlear Implant Recipients

Inclusion Criteria: * Eighteen years of age or older * User of CI600, CI500 or CI24RE implant * At least 3 months experience with a TGA approved Nucleus cochlear implant in at least one ear * Fluent speaker of English * A word speech recognition score of 20% or more when using the cochlear implant alone\* * Willing and able to provide written informed consent \*This can be based on clinical data if collected within the last 12 months Exclusion criteria: * Unable or unwilling to comply with the requirements of the clinical investigation as determined by the Investigator. * Investigator site personnel directly affiliated with this study and/or their immediate families: immediate family is defined as a spouse, parent, child, or sibling * Cochlear employees or employees of Contract Research Organizations or contractors engaged by Cochlear for the purposes of this investigation. * Current participation, or participation in another interventional clinical study/trial in the past 30 days, involving an investigational drug or device. (Unless the other investigation was/is a Cochlear sponsored investigation and determined by the investigator or Sponsor to not impact this investigation.