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Article Dans Une Revue Frontiers in Psychology Année : 2011

Facilitated Auditory Detection for Speech Sounds

Résumé

Lipreading has been shown to improve the intelligibility of speech in multitalker situations, where auditory stream segregation naturally takes place. This study investigated whether the benefit of lipreading is a result of a primary audiovisual interaction that enhances the obligatory streaming mechanism. Two behavioral experiments were conducted involving sequences of French vowels that alternated in fundamental frequency. In Experiment 1, subjects attempted to identify the order of items in a sequence. In Experiment 2, subjects attempted to detect a disruption to temporal iso-chrony across alternate items. Both tasks are disrupted by streaming, thus providing a measure of primary or obligatory streaming. Visual lip gestures articulating alternate vowels were synchronized with the auditory sequence. Overall, the results were consistent with the hypothesis that visual lip gestures enhance segregation by affecting primary auditory streaming. Moreover, increases in the naturalness of visual lip gestures and auditory vowels, and corresponding increases in audiovisual congruence may potentially lead to increases in the effect of visual lip gestures on streaming.
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hal-02144514 , version 1 (30-05-2019)

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Carine Signoret, Etienne Gaudrain, Barbara Tillmann, Nicolas Grimault, Fabien Perrin. Facilitated Auditory Detection for Speech Sounds. Frontiers in Psychology, 2011, 2, ⟨10.3389/fpsyg.2011.00176⟩. ⟨hal-02144514⟩
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