Publication: Tonal disruption in the speech of a language-delayed thai adult
Issued Date
1989-01-01
Resource Type
ISSN
02699206
Other identifier(s)
2-s2.0-0024555186
Rights
Mahidol University
Rights Holder(s)
SCOPUS
Bibliographic Citation
Clinical Linguistics and Phonetics. Vol.3, No.2 (1989), 191-202
Suggested Citation
Jack Gandour, Soranee Holasuit Petty, Rochana Dardarananda Tonal disruption in the speech of a language-delayed thai adult. Clinical Linguistics and Phonetics. Vol.3, No.2 (1989), 191-202. doi:10.3109/02699208908985281 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/15752
Research Projects
Organizational Units
Authors
Journal Issue
Thesis
Title
Tonal disruption in the speech of a language-delayed thai adult
Other Contributor(s)
Abstract
An acoustic-perceptual investigation was performed on fundamental frequency (F 0 ) contours associated with lexical tones in the speech of one 21-year-old adult speaker of Thai who did not start speaking until age 7. Thai is a tone language with five lexically contrastive tones-mid, low, falling, high, and rising. Measures of F, were taken from a minimal set of five monosyllabic citation forms. Results from phonemic identification tests indicated that AY exhibited a selective disruption in the production of Thai tones. In contrast to the normal Thai tone space, AY's tone space was reduced to three tones-mid, low, and rising. Acoustic analysis revealed that AYï? 1/2 s aberrant F 0 contours for the falling and high tones were virtually identical in terms of height and overall shape; both exhibited a slow, steady fall in F 0 in the upper range of AY's tone space. Listeners' failure to perceive AY's intended productions of the falling and high tones confirmed the perceptual importance of rapid change in F 0 slope in the Thai tone space. Findings are discussed with reference to the chronological order in which Thai tones are acquired in normal language development. © 1989 Informa UK Ltd All rights reserved: reproduction in whole or part not permitted.