Formant Trajectory Patterns of American English /l/ Produced by Adults and Children

Autor/inn/en	Chung, Hyunju; Weismer, Gary
Titel	Formant Trajectory Patterns of American English /l/ Produced by Adults and Children
Quelle	In: Journal of Speech, Language, and Hearing Research, 64 (2021) 3, S.809-822 (14 Seiten) PDF als Volltext Verfügbarkeit
Zusatzinformation	ORCID (Chung, Hyunju)
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1092-4388
Schlagwörter	Pronunciation; North American English; Vowels; Human Body; Acoustics; Young Children; Adults; Articulation (Speech); Speech Communication; Delayed Speech; Preschool Children; Age Differences; Physiology; Speech Evaluation; Comparative Analysis; Speech Impairments; Phonetics; Measurement; Louisiana (Baton Rouge) + Suchen Sie Ihr Suchwort? Aussprache; Amerikanisches Englisch; Menschlicher Körper; Akustik; Frühe Kindheit; Sprachverzögerung; Pre-school age; Preschool age; Child; Children; Pre-school education; Preschool education; Vorschulalter; Kind; Kinder; Vorschulkind; Vorschulkinder; Vorschulerziehung; Vorschule; Age; Difference; Age difference; Altersunterschied; Physiologie; Speech impairment; Speech handicap; Speech handicaps; Language handicps; Language impairments; Sprachbehinderung; Phonetik; Fonetik; Messverfahren
Abstract	Purpose: Most acoustic and articulatory studies on /l/ have focused on either duration, formant frequencies, or tongue shape during the constriction interval. Only a limited set of data exists for the transition characteristics of /l/ to and from surrounding vowels. The aim of this study was to examine second formant (F2) transition characteristics of /l/ produced by young children and adults. This was to better understand articulatory behaviors in the production of /l/ and potential clinical applications of these data to typical and delayed /l/ development. Method: Participants included 17 children with typically developing speech between the ages of 2 and 5 years, and 10 female adult speakers of Southern American English. Each subject produced single words containing pre- and postvocalic /l/ in two vowel contexts (/i, [near-close near-front unrounded vowel]/ and /[open-mid back rounded vowel], [open back unrounded vowel]/). F2 transitions, out of and into /l/ constriction intervals from the adjacent vowels, were analyzed for perceptually acceptable /l/ productions. The F2 transition extent, duration, and rate, as well as F2 loci data, were compared across age groups by vowel context for both pre- and postvocalic /l/. Results: F2 transitions of adults' /l/ showed a great similarity across and within speakers. Those of young children showed greater variability, but became increasingly similar to those of adults with age. The F2 loci data seemed consistent with greater coarticulation among children than adults. This conclusion, however, must be regarded as preliminary due to the possible influence of different vocal tract size across ages and variability in the data. Conclusions: The results suggest that adult patterns can serve as a reliable reference to which children's /l/ productions can be evaluated. The articulatory configurations associated with the /l/ constriction interval and the vocal tract movements into and out of that interval may provide insight into the underlying difficulties related to misarticulated /l/. (As Provided).
Anmerkungen	American Speech-Language-Hearing Association. 2200 Research Blvd #250, Rockville, MD 20850. Tel: 301-296-5700; Fax: 301-296-8580; e-mail: slhr@asha.org; Web site: http://jslhr.pubs.asha.org
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2024/1/01