Optimizing Bilateral and Single-sided-deafness Cochlear Implants for Functioning in Complex Auditory Environments

For Bilateral Cochlear Implant Users Arm: Inclusion Criteria: * two cochlear implants * acquired their hearing loss during adulthood or late childhood (post-lingual onset) * native English speaker * primarily use oral language * at least six months of cochlear implant use * Sufficient corrected or uncorrected visual acuity (20/50 or better) to read large-font text Exclusion Criteria: * people who do not use oral language will be excluded. * people with less than six months of device use will be excluded * other known disability or neurological disorder * women who are pregnant will be excluded from the CT portion of the study * people with any unaided audiometric tone-detection threshold better than 60 dB HL at standard audiometric frequencies (250-8000 Hz) in either ear will be excluded For Unilateral Cochlear Implant User with Single-Sided Deafness Arm: Inclusion Criteria: * one cochlear implant in one ear and a second ear with some acoustic hearing * acquired their hearing loss during adulthood or late childhood (post-lingual onset) * native English speaker * primarily use oral language * at least six months of cochlear implant use * Sufficient corrected or uncorrected visual acuity (20/50 or better) to read large-font text Exclusion Criteria: * people who do not use oral language will be excluded. * people with less than six months of device use will be excluded * other known disability or neurological disorder * women who are pregnant will be excluded from the C…