چكيده فارسي :
Our previous study (He and Dellwo 2017) divided the intensity contour of an utterance into positive and negative dynamics, namely the speeds of intensity increases from an intensity trough to its adjacent peak, or the speeds of intensity decreases from an intensity peak to its upcoming trough. The mean, standard deviation and pairwise variability index (PVI) were measured for both dynamics. It was discovered that measures of negative intensity dynamics explained around 70% between-speaker variability, whereas measures of negative dynamics, only around 30%. Since the intensity contour covaries with the mouth opening and closing gestures (Chandrasekaran et al. 2009), our results suggested that the mouth closing gestures may contain more speaker specific information. If it is really the case that mouth closing gestures contain more speaker-specific information, we should be able to obtain the same results using another acoustic measure (i.e., F1) that also covaries with the mouth opening and closing gestures
