Formant-Estimated Vocal Tract Length and Extrinsic Laryngeal Muscle Activation during Modulation of Vocal Effort in Healthy Speakers

Autor/inn/en	Groll, Matti D.; McKenna, Victoria S.; Hablani, Surbhi; Stepp, Cara E.
Titel	Formant-Estimated Vocal Tract Length and Extrinsic Laryngeal Muscle Activation during Modulation of Vocal Effort in Healthy Speakers
Quelle	In: Journal of Speech, Language, and Hearing Research, 63 (2020) 5, S.1395-1403 (9 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1092-4388
Schlagwörter	Human Body; Speech Communication; Physiology; Vowels; Phonemes; Adults + Suchen Sie Ihr Suchwort? Menschlicher Körper; Physiologie; Fonem
Abstract	Purpose: The goal of this study was to explore the relationships among vocal effort, extrinsic laryngeal muscle activity, and vocal tract length (VTL) within healthy speakers. We hypothesized that increased vocal effort would result in increased suprahyoid muscle activation and decreased VTL, as previously observed in individuals with vocal hyperfunction. Method: Twenty-eight healthy speakers of American English produced vowel--consonant--vowel utterances under varying levels of vocal effort. VTL was estimated from the vowel formants. Three surface electromyography sensors measured the activation of the suprahyoid and infrahyoid muscle groups. A general linear model was used to investigate the effects of vocal effort level and surface electromyography on VTL. Two additional general linear models were used to investigate the effects of vocal effort on suprahyoid and infrahyoid muscle activities. Results: Neither vocal effort nor extrinsic muscle activity showed significant effects on VTL; however, the degree of extrinsic muscle activity of both suprahyoid and infrahyoid muscle groups increased with increases in vocal effort. Conclusion: Increasing vocal effort resulted in increased activation of both suprahyoid and infrahyoid musculature in healthy adults, with no change to VTL. (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