This study looks at mappings between vocal tract area functions (obtained from MRI scans), vocal tract resonances, and speech formants for five New Zealand English (NZE) speakers. All eleven NZE monophthongs were investigated, for each speaker. Principal component (PC) analysis on the area functions of both the individual speakers and combined speaker set is performed. In all cases the first two PC account for most the variances in the data. The first two PCs of the vocal tract area accounted for between 7186% of the variance across the data for the individual speakers, and each was highly correlated between speakers. Across the combined speaker set the first two PCs accounted for 60.5% of the variance, and remained related to phonetic height and backness. This can clearly be seen when the transformed area function data is compared to the first two vocal tract resonances and speech formants.
Bibliographic reference. Watson, Catherine I. (2014): "Mappings between vocal tract area functions, vocal tract resonances and speech formants for multiple speakers", In INTERSPEECH-2014, 1993-1997.