Voice onset time praat3/9/2023 The voicing features of /t/ and omitted/weak realization of unaspirated affricates identified in the PHR group indicated that the deviant production of unaspirated affricates in the cleft palate group could be associated with the voicing characteristics of the alveolar stop /t/, and this merits further investigation.Īffricate Chinese Cleft palate Mandarin Speech Voice onset time.Ĭopyright © 2016. A group difference for VOT value was not found between the PNR group and the typical control group. A significantly smaller mean VOT value associated with /t/ was identified for the PHR group, as compared to the PNR group. An articulatory account of aspiration in English. Complications are discussed, and a standard set of labels proposed. The majority of unaspirated affricates were omitted and/or weakly realized by the group of PHR speakers, but not for the PNR group. We review the 50 year history of the concept of Voice Onset Time (VOT) This widely-used acoustic measure of consonantal voicing distinctions retains its usefulness. The VOT of /t/ was measured using PRAAT speech analysis software. The productions of each affricate were evaluated by two experienced speech therapists. Stimuli were collected through a series of picture naming tasks, targeting the production of initial consonants /t/ and three unaspirated Mandarin affricates /ts, tʂ, tɕ/. When voicing begins preceding the burst, the stop is called prevoiced, and the VOT is negative. Voice onset time (VOT) is defined as the time difference between the onset of the burst and the onset of voicing. Speakers with cleft palate were allocated into two groups based on expert perceptual judgment of nasality: one group with perceived normal resonance (PNR) (n = 14, average age = 9.3 years), and another group with perceived hypernasal resonance (PHR) (n = 9, average age = 10.3 years). DeepVOT - Automatic Measurement of Voice Onset Time and Prevoicing using Recurrent Neural Networks. Twenty-three children with repaired cleft palate and 22 age-matched typical native Mandarin speakers were recruited. You can access the three sections from the main menu. To examine perceptually the realization of unaspirated affricates and voice onset time (VOT) features of /t/ in Mandarin-speaking children with repaired cleft palate, and to explore the difficulties associated with unaspirated affricate production from the perspective of the VOT of /t/. Section 1: Background Information Section 2: Using Praat Section 3: Measuring Voice Onset Time (VOT).
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