Deafness
Conditions
Brief summary
Several studies in the past have tried to deactivate electrodes that are less optimal to improve speech recognition outcomes. The study aims to compare the measures based on which the deactivation was performed. The investigators aim to first examine if the measures are strongly correlated each other, and then compare the deactivation effects across measures. These measures are mainly behavioral including electrode discrimination, amplitude modulation detection thresholds, low-rate and focused detection thresholds and electrode-modiolus distance. The endpoint of the study is speech recognition performance post deactivation.
Interventions
BEHAVIORALSite selection
Turning off electrodes on the electrode array based on imaging and psychophysical measures
Sponsors
East Carolina University
Study design
Observational model
COHORT
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
15 Years to No maximum
Healthy volunteers
Yes
Inclusion criteria
* Native speakers of English * Cochlear Nucleus cochlear implant users or Advanced Bionics users * Postlingually deafened * Has had device experience for at least one year * Can be child or adult at the time of enrollment
Exclusion criteria
* None
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Speech recognition with deactivation | 12 months post award notice and will take up to 3.5 years to complete | Electrodes will be evaluated based on (1) pitch discrimination (2) focused thresholds (3) amplitude modulation detection thresholds and (4) distances from the modious. Electrodes will be deactivated based on each of these measures and speech recognition will be evaluated to assess the effect of deactivation. The benefit of deactivation (speech recognition after deactivation minus before deactivation) will be derived for each measure. The measure that produces the greatest benefit will be identified. |
Countries
United States
Outcome results
None listed