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• W212366986 abstract "ABSTRACT Most studies of intraoral pressure (IOP) variation have focused on consonantal voicing, place, and manner, but indirect data suggest that IOP during consonants may also show coarticulatory effects due to surrounding vowels. Here, we explore how IOP varies in consonants and consonant clusters of two German speakers depending on following vowel height. Our data suggest that IOP varies consistently with vowel context, particularly with respect to the duration of the IOP pulse. Comparison with simultaneously-recorded EPG data indicate that the IOP results reflect longer articulatory contact time in the high vowel context. Keywords: Intraoral pressure, obstruents, vowels, EPG 1. INTRODUCTION When the vocal tract is obstructed, pressure within the supraglottal vocal tract (intraoral pressure; hereafter IOP) increases. It is well-known that peak IOP levels and the shape of the IOP trajectory vary systematically with consonant voicing status (e.g., [1Ð4] ) as well as with manner status (viz., stops vs. fricatives, cf. [5Ð7]). Articulatory placement may also affect IOP: Ohala [8] observed that more anterior consonants provide speakers with greater opportunities for aerodynamic management (cavity enlargement). There is limited aerodynamic evidence for vowel context effects on IOP. Netsell [9] reported slightly but significantly higher IOPs in repetitions of /pi/ compared to /pa/. This would be consistent with data showing that speakers have higher jaw positions during consonant closures preceding high vowels than low vowels (e.g. [10]). Indirect evidence also suggests that IOP is sensitive to vowel context. One explanation for longer VOTs following [ki] as compared to [ti] or [pi] (e.g., [11]) is that a higher pressure buildup behind the posterior constriction is discharged over a longer period of time. Klatt [12] also reported that VOTs were longer for stops releasing into high vowels as compared to lower vowels. This too could be explained in terms of aerodynamic parameters: Releasing the built-up pressure into a smaller cavity (as for a high vowel) should result in a slower pressure discharge due to increased resistance downstream of the occlusion. Despite such suggestions that vowel context may be relevant to understanding vocal tract aerodynamics around obstruents, few studies have directly explored this topic. In this paper, we investigate IOP trajectories during consonants or consonant clusters in two speakers of German where the following vowel is either high (/i/ or /I/) or low (/A/). 2. METHODS 2.1. Instrumentation and pre-processing A more complete recording protocol is provided in [13]. Briefly, we simultaneously recorded electropalatographic (EPG) data; IOP; and acoustics. The EPG data were obtained using a Reading EPG 3 system, with custom-made palates for each speaker, and a sampling rate of 100 Hz. The IOP signal was collected using an Endevco 8507C-2 pressure transducer fitted into a small plastic tube at the posterior end of the EPG palate. A separate tube passed around the teeth outside the oral cavity recorded atmospheric pressure, so that the IOP signal represents the difference between IOP at the sensor site (posterior end of the hard palate) and atmospheric pressure. The IOP data were sampled at 1859 Hz using PCQuirer. Finally, an acoustic signal was recorded to DAT at 44 kHz. After recording, all data were imported into Matlab for further processing." @default.
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• W212366986 date "2007-01-01" @default.
• W212366986 modified "2023-09-27" @default.
• W212366986 title "THE SENSITIVITY OF INTRAORAL PRESSURE IN CONSONANTS AND CONSONANT CLUSTERS TO FOLLOWING VOWEL CONTEXT IN GERMAN" @default.
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