Sky Onosson is a linguist whose research connects phonetics, phonology and quantitative analysis of language variation. His research statement emphasizes the changing acoustic structure of vowels, including diphthongs, and the use of the R for modeling and visualization.[ref]
His 2018 dissertation investigated Canadian raising by comparing vowel duration and formant trajectories across Canadian and two American dialect groups.[ref]
An Acoustic Study of Canadian Raising in Three Dialects of North American English by Sky Onosson. Abstract, printed p.iii
Comparing a trajectory instead of only one instant helps distinguish a vowel's changing quality from the effects of duration. His work consequently treats time alignment as part of the scientific analysis, rather than assuming that measurements at a single relative time capture every contrast.Homepage: onosson.github.io/
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