Haskins Publications

Number	1600
Year	2008
Drawer	27
Entry Date	06/01/2010
Authors	Shadle, C.H., Berezina, M., Proctor, M., Iskarous, K.
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Publication	Proceedings of the 8th International Seminar on Speech Production 2008, (Eds.) Sock, R., Fuchs, S., Laprie, Y., Strasbourg, France, pp. 413-416.
url	http://www.haskins.yale.edu/Reprints/HL1600.pdf
Abstract	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 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.
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