Phase Asymmetries in Normophonic Speakers: Visual Judgments and Objective Findings

Autor/inn/en	Bonilha, Heather Shaw; Deliyski, Dimitar D.; Gerlach, Terri Treman
Titel	Phase Asymmetries in Normophonic Speakers: Visual Judgments and Objective Findings
Quelle	In: American Journal of Speech-Language Pathology, 17 (2008) 4, S.367-376 (10 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1058-0360
DOI	10.1044/1058-0360(2008/07-0059)
Schlagwörter	Speech; Visual Aids; Measurement Techniques; Geometry; Visual Perception; Video Technology; Comparative Analysis; North Carolina; South Carolina + Suchen Sie Ihr Suchwort? Speaking; Sprechen; Anschauungsmaterial; Messtechnik; Geometrie; Visuelle Wahrnehmung
Abstract	Purpose: To ascertain the amount of phase asymmetry of the vocal fold vibration in normophonic speakers via visualization techniques and compare findings for habitual and pressed phonations. Method: Fifty-two normophonic speakers underwent stroboscopy and high-speed videoendoscopy (HSV). The HSV images were further processed into 4 visual displays: HSV playbacks, digital kymography (DKG) playbacks, mucosal wave kymography playbacks, and static kymographic images of the medial line from the DKG playback. Two types of phase asymmetries, left-right and anterior-posterior, were rated on a scale from 1 to 5. Objective measures of left-right phase asymmetry were obtained. Results: The majority of normophonic speakers (81%) were noted to display anterior-posterior asymmetry; however, 66% of those were characterized as mild. Seventy-nine percent of participants were noted to display left-right asymmetry; however, 72% of those were mild. A moderate relationship between the objective measures and subjective ratings was found. Conclusions: Most normophonic speakers exhibit mild left-right and anterior-posterior asymmetries for both habitual and pressed phonations. Asymmetries were noted more often during habitual than pressed phonations, and when visualized by HSV and kymography than stroboscopy. Differences between objective measures and visual judgments support the need to quantify vocal fold vibratory features. (Contains 5 tables and 5 figures.) (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10