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Effect of stimulus waveform on human sensitivity to electrical stimulation of the auditory nerve (l’intervention aura lieu en français)| old_uid | 1627 |
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| title | Effect of stimulus waveform on human sensitivity to electrical stimulation of the auditory nerve (l’intervention aura lieu en français) |
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| start_date | 2006/10/17 |
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| schedule | 13h30 |
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| online | no |
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| location_info | bât. recherche, 3e étage, Salle de réunion du laboratoire de virologie |
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| summary | Cochlear implants (CI) have provided a unique way to restore some sense of hearing to profoundly-deaf subjects via direct stimulation of the auditory nerve (AN). Most CI systems use symmetric, biphasic electrical pulse trains. However, results from animal and computational models suggested that modifying the shape of the pulse may be beneficial in terms of reducing power consumption, increasing dynamic range, reducing channel interaction, and/or improving spatial selectivity. This project aims to better understand the properties of the human AN by comparing behavioral thresholds and most comfortable levels of CI subjects for a variety of stimulus waveforms. More particularly, the effects of using asymmetric pulses (where one of the two phases has a lower amplitude and a longer duration than the other) and of inserting a gap between the two phases of a pulse are studied. The results have implications for the design of new speech-processing strategies and give insight in different aspects of the functioning of the AN. |
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| responsibles | Grimault |
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