Variation in articulatory timing of three English consonants: An electropalatographic investigation

McAuliffe, M. J., Ward, E. C. and Murdoch, B. E. (2003) Variation in articulatory timing of three English consonants: An electropalatographic investigation. Clinical Linguistics & Phonetics, 17 1: 43-62. doi:10.1080/0269920021000066846

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Author McAuliffe, M. J.
Ward, E. C.
Murdoch, B. E.
Title Variation in articulatory timing of three English consonants: An electropalatographic investigation
Journal name Clinical Linguistics & Phonetics   Check publisher's open access policy
ISSN 0269-9206
1464-5076
Publication date 2003-01-01
Year available 2003
Sub-type Article (original research)
DOI 10.1080/0269920021000066846
Open Access Status
Volume 17
Issue 1
Start page 43
End page 62
Total pages 20
Editor Martin J. Ball
Thomas W. Powell
Place of publication Abingdon, United Kingdom
Publisher Taylor & Francis
Language eng
Subject C1
730303 Occupational, speech and physiotherapy
380204 Laboratory Phonetics and Speech Science
Abstract Increasingly, electropalatography (EPG) is being used in speech pathology research to identify and describe speech disorders of neurological origin. However, limited data currently exists that describes normal articulatory segment timing and the degree of variability exhibited by normal speakers when assessed with EPG. Therefore, the purpose of the current investigation was to use the Reading EPG3 system to quantify segmental timing values and examine articulatory timing variability for three English consonants. Ten normal subjects repeated ten repetitions of CV words containing the target consonants /t/, /l/, and /s/ while wearing an artificial palate. The target consonants were followed by the /i/ vowel and were contained in the carrier phrase 'I saw a __'. Mean duration of the approach, closure/constriction, and release phases of consonant articulation were calculated. In addition, inter-subject articulatory timing variability was investigated using descriptive graphs and intra-subject articulatory timing variability was investigated using a coefficient of variation. Results revealed the existence of intersubject variability for mean segment timing values. This could be attributed to individual differences in the suprasegmental features of speech and individual differences in oral cavity size and structure. No significant differences were reported for degree of intra-subject variability between the three sounds for these same phases of articulation. However, when this data set was collapsed, results revealed that the closure/constriction phase of consonant articulation exhibited significantly less intra-subject variability than both the approach and release phases. The stabilization of the tongue against the fixed structure of the hard palate during the closure phase of articulation may have reduced the levels of intra-subject variability.
Keyword Articulatory timing
Electropalatography
Consonant articulation
Q-Index Code C1
Institutional Status UQ

 
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Created: Wed, 15 Aug 2007, 05:15:21 EST