15th International Congress of Phonetic Sciences (ICPhS-15)
Different glottal gestures regulate contrasts between voiced, unaspirated, and aspirated stops in many languages. But what about contextually-predictable variations in VOT, such as longer VOT before close vowels and sonorant consonants than before open vowels: are aerodynamic factors responsible, as has been hypothesized, or could different glottal gestures be the cause? Glottal aperture was monitored in two adult male American-English speakers using photoglottography. The results give no indication that glottal gestures vary systematically with these contextual VOT variations, thus indirectly supporting the aerodynamic hypothesis.
Bibliographic reference. Larson, Julie (2003): "A role for the larynx in contextual VOT variation in American English?", In ICPhS-15, 3217-3220.