Back to Search
Start Over
Theoretical analysis of maximum flow declination rate versus maximum area declination rate in phonation
- Source :
- Journal of speech, language, and hearing research : JSLHR. 49(2)
- Publication Year :
- 2004
-
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.
- Subjects :
- Linguistics and Language
Air Pressure
Glottis
Acoustics
Maximum flow problem
Geometry
Declination
Models, Biological
Language and Linguistics
Inertance
Biomechanical Phenomena
Speech and Hearing
medicine.anatomical_structure
Amplitude
Phonation
Vocal folds
medicine
Humans
Pulmonary Ventilation
Mathematical Computing
Vocal tract
Mathematics
Subjects
Details
- ISSN :
- 10924388
- Volume :
- 49
- Issue :
- 2
- Database :
- OpenAIRE
- Journal :
- Journal of speech, language, and hearing research : JSLHR
- Accession number :
- edsair.doi.dedup.....0099f05d5c5b8a319633755eaf436ea3