Electrophysiological Study of Interindividual Differences in Speech-understanding Among Cochlear Implant Patients

Electrophysiological Study of Interindividual Differences in Speech-understanding Among Cochlear Implant Patients

Differences in speech-understanding and the quality of the subjective perception among cochlear implant patients (Digisonic SP) depends on numerous factors. The electrical field distribution (interaction between electrodes) could also explain the disparity of the performances? The objective of our study was to quantify the influence of the electrical field interactions between the channels of stimulation according to the vocal performances of the implanted subjects, for various subjective levels of electric stimulation.

Inclusion Criteria:

• Subject of French language
• Subject with a moderate bilateral sensorineural hearing loss, severe to profound
• Sensorineural hearing loss post-lingual (after onset of language acquisition)
• Subject paired with the implant Neurelec (Appendix 1) for more than 9 months
• Subject has received an appropriate setting under usual clinical follow-up
• Elderly 18 to 75 years
• Subject giving consent

Exclusion Criteria:

• Sensorineural hearing loss pre-lingual
• Deafness following a meningitis, or neurodegenerative diseases
• Illiteracy
• Pregnant women
• Subject blind
• Subject enjoying a measure of legal protection
• Subject incapable of giving consent
• Subject vulnerable