Measuring lingual coarticulation from midsagittal tongue contours: Description and example calculations using English /t/ and /ɑ/



Zharkova, Natalia and Hewlett, Nigel (2009) Measuring lingual coarticulation from midsagittal tongue contours: Description and example calculations using English /t/ and /ɑ/. Journal of Phonetics, 37 (2). pp. 248-256. ISSN 00954470

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Abstract

The purpose of this study was to test the feasibility of a protocol for measuring coarticulation using tongue surface outline data derived from ultrasound imaging. Ultrasound and acoustic data were collected from three speakers of Southern British English while they repeated a list of three sentences 15 times. Tongue surface outlines for the consonant /t/ in /a{script}ta{script}/ (in "...Ma tasked...") were compared with those for the /t/ in /iti/ (in "... Leigh teased...") and tongue surface outlines for the vowel /a{script}/ in /a{script}ka{script}/ (in "... Ma cast...") were compared with those in /a{script}ta{script}/. Nearest neighbour distance calculations were used for the comparison of tongue surface outlines. Mean distance in midsagittal tongue surface outline between tokens of the same phoneme across two different environments was taken as a measure of the phoneme's susceptibility to environmental influence. The calculations show that the tongue contour during /t/ adapts to the influence of the neighbouring vowels approximately three times more than the tongue contour during /a{script}/ adapts to the influence of the neighbouring consonants. The applicability of the measure proposed in this paper to future speech research using ultrasound and other articulatory techniques is discussed. © 2008 Elsevier Ltd. All rights reserved.

Item Type: Article
Divisions: School of Health Sciences > Clinical Audiology, Speech and Language Research Centre
Date Deposited: 01 Oct 2009 09:59
Last Modified: 19 Mar 2014 12:55
URI: http://eresearch.qmu.ac.uk/id/eprint/704

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