Mechanical models of fricatives based on MRI-derived vocal tract shapes

Christine H. Shadle, Maria Berezina, Michael Proctor, Khalil Iskarous

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

10 Citations (Scopus)


Articulatory shapes observed in MRI data of fricative production have been used in mechanical models to study the acoustic effects of tongue grooving, upper and lower teeth, size of the sublingual cavity, and position of the tongue relative to a labiodental constriction. The tongue groove shape and extent affects spectral shape and amplitude, particularly at higher frequencies. Inclusion of the teeth increases noise generation, as expected; the amount depends on the tongue shape. The rate of increase of amplitude with flowrate also varied across teeth and tongue models, indicating either differences in the source types or in the efficiency of exciting tract modes. These experiments should help us identify the contribution of each element of a more realistic vocal tract geometry, and allow us to better understand acoustic features of most use in any comparison of fricatives.

Original languageEnglish
Title of host publicationProceedings of ISSP 2008 - 8th International Seminar on Speech Production
EditorsRudolph Sock, Susanne Fuchs, Yves Laprie
Place of PublicationRocquencourt. France
Number of pages4
Publication statusPublished - 2008
Externally publishedYes
Event8th International Seminar on Speech Production, ISSP 2008 - Strasbourg, France
Duration: 8 Dec 200812 Dec 2008


Other8th International Seminar on Speech Production, ISSP 2008

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