par Rautu, Ioana-Sabina ;Bourguignon, Mathieu ;Jousmäki, Veikko;De Tiege, Xavier ;Bertels, Julie
Référence Journée du Groupe de Contact en Psycholinguistique et Neurolinguistique (Mons)
Publication Non publié, 2022-11-25
Communication à un colloque
Résumé : Speech-in-noise (SiN) perception is a challenging process. Recent work has shown that somatosensory inputpresented together with the speech signal supports SiN understanding. It remains unclear, however, whethertactile stimulation can also improve SiN comprehension in multi-talker scenarios, when trying to follow onespeaker among multiple concurrent ones. Moreover, to date no studies have examined the influence of thestimulation location and the relationship between tactile sensitivity and the extent of audio-tactile SiNenhancement. In the current study, participants received speech-derived tactile vibrations to either the right, leftor both palms while listening to sentences embedded in multi-talker background noise. SiN recognition wascompared between conditions with and without vibrotactile stimulation by testing the participants’ ability toreproduce the sentences at various noise levels. Tactile sensitivity was evaluated for each hand by usingvibrotactile threshold measurements. Overall, participants’ SiN performance was significantly better whenreceiving vibrotactile stimulation than in audio-only conditions. The stimulated hand had no significant effect onthis improvement. Critically, when controlling for SiN ability (i.e., SiN performance in the absence of tactilestimulation), the vibrotactile sensitivity of the left hand correlated with and predicted the extent of improvementin the unimanual, but not bimanual, audio-tactile conditions. These findings reflect the potential of tactile inputto support SiN performance in multi-talker settings. Moreover, they reveal that this improvement is partlyinfluenced by vibrotactile sensitivity.

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