Benefit of contextual cues for the perception of temporally degraded speech
Mots-clés :
Speech processing, Speech recognition, Contextual cuesRésumé
L'effet d'indices contextuels sur la compréhension de la parole dégradée a été étudié. Deux groupes de sujets, âges respectivement de 20-25 et 50-59 ans, ont participé à cette étude. Trois listes de 50 phrases ont été présentées, k chacune des oreilles, de façon continue ou interrompue avec un taux de 8/s ou 2/s. Pour la moitié des phrases de chacune des listes, le dernier mot était hautement prévisible sur la base du contexte et, dans la seconde moitié, peu prévisible. La reconnaissance du mot final décroît avec l'interruption, et ce davantage pour le taux de 2/s. Le contexte s'est avéré compensatoire. Les sujets plus âgés ne performent pas moins bien que les plus jeunes. Les facteurs pouvant potentiellement expUqués ces résultats sont discutés.
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