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Visual speech improves the intelligibility of time-expanded auditory speech
This study investigated the effects of intermodal timing differences and speed differences on word intelligibility of auditory-visual speech. Words were presented under visual-only, auditory-only, and auditory-visual conditions. Two types of auditory-visual conditions were used: asynchronous and expansion conditions. In the asynchronous conditions, the audio lag was 0-400 ms. In the expansion conditions, the auditory signal was time expanded (0-400 ms), whereas the visual signal was kept at thedoi:10.1097/wnr.0b013e3283279ae8 pmid:19240661 fatcat:qzvsn7zafrdp7dqrna2sc7daku