14th International Congress of Phonetic Sciences (ICPhS-14)

San Francisco, CA, USA
August 1-7, 1999


Human Speaker Nomograms Using EMA Data

Liam Fitzpatrick, Ailbhe Ní Chasaide

Centre for Language and Communication Studies, University of Dublin, Trinity College, Ireland

Fant's nomograms explore the relationship between articulatory settings and acoustic consequences for vowel type productions, using an articulatory model. In this study, EMA, EPG and acoustic data were obtained for a phonetician attempting to replicate Fant's nomograms for rounded and unrounded high vowel continua. Results are compared with the most closely corresponding nomogram data. One difference was the constancy of the resonance primarily associated with the back cavity, which contrasted with the rising frequency of Fant's nomograms. A more rapid fall in the resonance primarily associated with the front cavity was also seen for articulations in the pre- to midpalatal region. The simplifying assumption of the articulatory model which retains a constant constriction length and shape regardless of stricture location may represent an impossibility in human speech, where constriction length varies considerably. Divergences from Fant's nomorams may also be due to adjustments such as vertical larynx movement, which speakers can control but which may covary with changes in stricture location.

Full Paper

Bibliographic reference.  Fitzpatrick, Liam / Ní Chasaide, Ailbhe (1999): "Human speaker nomograms using EMA data", In ICPhS-14, 2021-2024.