Bimodal, CROS and Severe Profound Hearing Loss Study
Cochlear Implant, Severe-Profound Hearing Loss, Hearing Loss, Bilateral
About this trial
This is an interventional treatment trial for Cochlear Implant
Eligibility Criteria
Inclusion Criteria:
- Participant is willing and able to give informed consent for participation in the study.
- Male or Female, aged 18 years or above.
- Consistent unilateral user of an Advanced Bionics cochlear implant and a contralateral hearing aid for at least 6 months, ideally 12 months, and Bilateral severe to profound hearing loss (meeting NICE criteria for implantation-2009). (group 1)
- Consistent unilateral user of an Advanced Bionics cochlear implant for at least 6 months and ideally 12 months, with no useful contralateral hearing (group 2)
- Consistent user of bilateral hearing aids for at least six months (group 3) and bilateral severe profound hearing loss (80dB or worse at 2000 and 4000 Hz with speech discrimination of at least 50% IHR sentences live voice at 60dBA)
- First language English
- Post-lingual onset of severe to profound hearing loss
- No other handicaps that would interfere with participation in the study in the opinion of the Principle Investigator
Exclusion Criteria:
- Unstable cochlear implant or hearing aid fitting
- Using medication in an intermittent manner that might influence hearing levels
- Cognitive or psychological challenges that might lead to variations in attention
Sites / Locations
- Addenbrooke's Hospital
Arms of the Study
Arm 1
Arm 2
Arm 3
Other
Other
Other
Cochlear Implant and Hearing Aid
Cochlear Implant alone
Hearing Aid and Hearing Aid
Comparing performance of conventional hearing aid fitting to Phonak's Bimodal Fitting formula using the Phonak Naida Link hearing aid. All patients are tested in a bimodal (hearing aid plus cochlear implant) setup. Initial tests are completed with the Advanced Bionics Naida Q70 or Q90 sound processor and the patient's own hearing aid. In this arm, a patient's own hearing aid is replaced with the Phonak Naida Link hearing aid to test if there is a benefit.
To determine if the addition of a contralateral routing of signal (CROS) microphone on the un-implanted ear improves performance. Baseline tests are completed with Advanced Bionics Naida Q70 or Q90 sound processors. Patients are then given the Phonak Naida Link CROS aid to test if there is a benefit.
Comparing performance of conventional hearing aid fitting to a modified signal processing strategy more aligned with how a cochlear implant manages sound. All patients are tested initially with their own hearing aids to obtain a baseline measurement. Patients are then fitted with a modified Phonak hearing aid to determine if performance improves.