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Due to its aerodynamic, articulatory, and acoustic complexities, the fricative /s/ is known to require high precision in its control, and to be highly resistant to coarticulation. This study documents in detail how jaw, tongue front, tongue back, lips, and the first spectral moment covary during the production of /s/, to establish how coarticulation affects(More)
The tongue is critical in the production of speech, yet its nature has made it difficult to measure. Not only does its ability to attain complex shapes make it difficult to track, it is also largely hidden from view during speech. The present article describes a new combination of optical tracking and ultrasound imaging that allows for a noninvasive,(More)
It is well-established that prosodic structure has an influence on speech production. However, a great deal of the work showing the influence of prosody on articulation and acoustics has fo-cused on segments known to exhibit considerable variability in their production. Sibilants are highly constrained speech segments , due to the precise aerodynamic tasks(More)
The study investigated the articulatory basis of locus equations, regression lines relating F2 at the start of a Consonant-Vowel (CV) transition to F2 at the middle of the vowel, with C fixed and V varying. Several studies have shown that consonants of different places of articulation have locus equation slopes that descend from labial to velar to alveolar,(More)
The ability of speakers to exaggerate speech sounds ("hyperarticulation") has led to the theory that the targets themselves must be hyperspace hyperarticulated. Johnson, Flemming, and Wright (1993) found that perceptual "best exemplar" choices for vowels were more speech extreme than listeners' own productions. Our first experiment, using their procedure,(More)
This paper reports on an acoustic experiment to investigate prosodic and segmental factors governing the degree of spirantization of intervocalic /g/ in Castilian Spanish. Significant variation in the degree of /g/-spirantization, measured here in terms of relative acoustic energy, is found to be conditioned by stress and the quality of the vowels adjacent(More)
The present study focuses on differences in lingual coarticulation between French children and adults. The specific question pursued is whether 4-5 year old children have already acquired a synergy observed in adults in which the tongue back helps the tip in the formation of alveolar consonants. Locus equations, estimated from acoustic and ultrasound(More)
Russian maintains a contrast between non-palatalized and palatalized trills that has been lost in most Slavic languages. This research investigates the phonetic expression of this contrast in an attempt to understand how the contrast is maintained. One hypothesis is that the contrast is stabilized through resistance to coarticulation between the trill and(More)
This paper discusses the pivot pattern of tongue movement. In this pattern, there is a point in the vocal tract where there is no motion, but there is motion at points of the vocal tract anterior and posterior to the pivot point. Based on tongue edge tracings of frames from ultrasound and x-ray dynamic imaging of the vocal tract, I will show that the pivot(More)