Phonological control of time
Speech unfolds in time in ways that are language-specific and seem to be conditioned in part by phonological structure. However, language-specific timing patterns are generally still situated outside the scope of phonological theory. Articulatory Phonology (AP) is an exception in this regard. In AP, language-specific timing patterns are modelled in terms of coordination between articulatory gestures, primitive units of phonological contrast. The network of coordination relations between gestures drive articulatory movements in speech. In this talk, I’ll present two case studies that present apparent challenges to AP and show how the challenges can be resolved. The first case study presents Electromagnetic Articulography data tracking articulatory movements in Mandarin Chinese. The key finding is that the relative timing between consonants and vowels in Mandarin varies systematically with token-to-token variability in the spatial position of the tongue, a pattern which is not expected under feed-forward timing control, as in AP. The second case study is a field-based ultrasound study of lenition in Iwaidja, an Australian aboriginal language. In intervocalic position, velar approximants in Iwaidja variably delete. The challenge for AP is that temporal duration is partially preserved even as the velar consonant is completely lost. Developing a theoretical account of these patterns in AP reveals dimensions over which phonological systems shape language-specific variation in timing.