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.
Study Type
OBSERVATIONAL
Turning off electrodes on the electrode array based on imaging and psychophysical measures
Department of Communication Sciences and Disorders, ECU
Greenville, North Carolina, United States
Speech recognition with deactivation
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.
Time frame: 12 months post award notice and will take up to 3.5 years to complete
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