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Mécanismes neurophysiologiques de la perception de flux sonores chez l'Homme : effets des contexts acoustiques et attentionnels.

Abstract : Auditory perception is especially based on the separation of simultaneously active sound sources (auditory scene analysis) and the encoding of spatial and spectral attributes.
We have characterized the neurophysiological mechanisms underlying these processes by investigating the cortical electrophysiological responses to long-lasting auditory streams, in various acoustical and attentional contexts.
The results suggest a differential encoding of spatial and spectral features in the auditory cortex. The perception of two concurrent auditory streams would depend on frequency selectivity and habituation mechanisms. Auditory attention could facilitate sound selection in an acoustic mixture by enhancing cortical responses to relevant information and reducing responses to distracting sounds. A fronto-parietal network could be involved in the control of these mechanisms.
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https://tel.archives-ouvertes.fr/tel-00189055
Contributor : Aurélie Bidet-Caulet <>
Submitted on : Monday, November 19, 2007 - 10:17:29 PM
Last modification on : Thursday, November 21, 2019 - 2:24:54 AM
Long-term archiving on: : Monday, April 12, 2010 - 2:45:42 AM

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Aurélie Bidet-Caulet. Mécanismes neurophysiologiques de la perception de flux sonores chez l'Homme : effets des contexts acoustiques et attentionnels.. Neurosciences [q-bio.NC]. Université Claude Bernard - Lyon I, 2007. Français. ⟨tel-00189055⟩

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