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Acoustic pattern recognition of fricative-vowel coarticulation by the self-organizing map
L Leinonen1, R Mujunen, J Kangas
1Department of Physiology, University of Helsinki, Finland.
Folia Phoniatrica
|January 1, 1993
Abstract:
Word-initial samples of fricative [s] preceding vowels [a:], [ae:], [e:], [i:], [u:], [o:], and [y:] in Finnish words were studied with the self-organizing map. An acoustic map was first calculated from speech samples of women without speech disorders, and then the [s] samples were measured on this map. In all 10 subjects the [s] samples preceding the rounded vowels [u:] and [o:] clearly differed from the samples in front of unrounded [a:], [ae:], [e:], and [i:]. The coarticulatory phenomena observed on the map were due to changes in the composition and stability of the fricative spectrum.