Sixth International Conference on Spoken Language Processing (ICSLP 2000)
October 16-20, 2000
Are Static MRI Measurements Representative of Dynamic Speech? Results From a Comparative Study Using MRI, EPG and EMA
Centre for Speech Technology (CTT), KTH, Stockholm, Sweden
As the acquisition times of static MRI have diminished, the
focus of MRI studies has shifted from isolated phonemes to e.g.
vowel-consonant sequences. The articulations are hence
somewhat closer to running speech and measurements of
contextual influence can be made. The acquisition in the vast
majority of the MRI studies still requires artificially sustained
articulations, however, and it is hence not evident that the
measurements are representative of the subjectís normal speech.
In order to assess the influence of the artificial sustaining,
results from two coarticulatory studies, using static MRI and
EMA-EPG, respectively, are compared.
The differences between the two studies are substantial
concerning jaw position, lip protrusion and tongue contours.
However, rather than showing non-representative articulations,
the articulations in the MRI data are judged to represent a case
of hyperarticulated speech, and should still be valid if
considered as that.
Engwall, Olov (2000):
"Are static MRI measurements representative of dynamic speech? results from a comparative study using MRI, EPG and EMA",
In ICSLP-2000, vol.1, 17-20.