Theoretical Analysis of Maximum Flow Declination Rate versus Maximum Area Declination Rate in Phonation

Autor/in	Titze, Ingo R.
Titel	Theoretical Analysis of Maximum Flow Declination Rate versus Maximum Area Declination Rate in Phonation
Quelle	In: Journal of Speech, Language, and Hearing Research, 49 (2006) 2, S.439-447 (9 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1092-4388
Schlagwörter	Voice Disorders; Models; Comparative Analysis; Phonology; Phonetic Analysis; Speech Language Pathology; Intonation; Structural Analysis (Linguistics); Acoustics; Correlation + Suchen Sie Ihr Suchwort? Stimmstörung; Analogiemodell; Fonologie; Phonetic method; Lautanalytische Methode; Structural analysis; Strukturanalyse; Akustik; Korrelation
Abstract	Purpose: Maximum flow declination rate (MFDR) in the glottis is known to correlate strongly with vocal intensity in voicing. This declination, or negative slope on the glottal airflow waveform, is in part attributable to the maximum area declination rate (MADR) and in part to the overall inertia of the air column of the vocal tract (lungs to lips). The purpose of this theoretical study was to show the possible contributions of air inertance and MADR to MFDR. Method: A simplified computational model of the kinematics of vocal fold movement was utilized to compute a glottal area function. The glottal flow was computed interactively with lumped vocal tract parameters in the form of resistance and inertive reactance. Results: It was shown that MADR depends almost entirely on the ratio of vibrational amplitudes of the lower to upper margins of the vocal fold tissue. Adduction, vertical phase difference, and prephonatory convergence of the glottis have a lesser effect on MADR. A relatively simple rule was developed that relates MFDR to a vibrational amplitude ratio and vocal tract inertance. Conclusion: It was concluded that speakers and singers have multiple options for control of intensity, some of which involve more source-filter interaction than others. (Contains 8 figures.) (Author).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10