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  • Title: Aerodynamic assessment of velopharyngeal function during normal speech containing different places of articulation.
    Author: Dotevall H, Lohmander-Agerskov A, Almquist SA, Bake B.
    Journal: Folia Phoniatr Logop; 1998; 50(2):53-63. PubMed ID: 9624856.
    Abstract:
    The aim of this study was to describe the aerodynamics related to velopharyngeal function during speech in bilabial, dental, and velar articulatory positions in Swedish speakers. Repeated syllables including voiceless stop consonants and sentences including combinations of voiceless stops and nasal consonants were uttered by 11 normal adults. Oropharyngeal pressure was assessed with a miniature pressure transducer positioned transnasally, in combination with measurement of nasal pressure and nasal airflow. The corresponding velopharyngeal opening area was estimated. The results suggest that the velopharyngeal function during stop consonants is similar in different articulatory positions. Differences in oropharyngeal pressure and nasal airflow between bilabial versus dental and velar positions were found, presumably due to differences in volume and compliance of the vocal tract.
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