Journal article
Theoretical analysis of maximum flow declination rate versus maximum area declination rate in phonation
Journal of speech, language, and hearing research, Vol.49(2), pp.439-447
04/2006
DOI: 10.1044/1092-4388(2006/034)
PMID: 16671855
Abstract
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.
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.
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.
It was concluded that speakers and singers have multiple options for control of intensity, some of which involve more source-filter interaction than others.
Details
- Title: Subtitle
- Theoretical analysis of maximum flow declination rate versus maximum area declination rate in phonation
- Creators
- Ingo R Titze - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Journal of speech, language, and hearing research, Vol.49(2), pp.439-447
- DOI
- 10.1044/1092-4388(2006/034)
- PMID
- 16671855
- ISSN
- 1092-4388
- eISSN
- 1558-9102
- Grant note
- 5R01-DC04224-06 / NIDCD NIH HHS R01 DC004224 / NIDCD NIH HHS R01 DC004224-06A1 / NIDCD NIH HHS R01 DC004224-07 / NIDCD NIH HHS
- Language
- English
- Date published
- 04/2006
- Academic Unit
- School of Music; Communication Sciences and Disorders
- Record Identifier
- 9984719568002771
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