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Intraglottal pressure profiles for a symmetric and oblique glottis with a divergence angle of 10 degrees.
Intaglottal pressure profiles for a Plexiglas model of the larynx with a glottis having a 10-degree divergence angle and either a symmetric orientation or an oblique angle are reported to suggest aerodynamic asymmetries could be a factor contributing to normal jitter values and differences in vocal fold phasing. Expand
Dynamic glottal pressures in an excised hemilarynx model.
  • F. Alipour, R. Scherer
  • Geology, Medicine
  • Journal of voice : official journal of the Voice…
  • 1 December 2000
Examination of time-dependent glottal pressure profiles using a canine hemilarynx approach indicates that the pressures in the glottis vary both vertically and longitudinally throughout the phonatory cycle, giving rise to a new concept called dynamic bidirectional pressure gradients in theglottis. Expand
The Effects of Aging on Acoustic Parameters of Voice
It is indicated that elderly Iranian speakers had significantly greater vocal instability than young and middle-aged Iranian adults, as measured by the selected acoustic parameters. Expand
Flow visualization and acoustic consequences of the air moving through a static model of the human larynx.
The results suggest that laryngeal flow resistance and the complex jet flow structure exiting the glottis are highly affected by flow rate and the presence of the false vocal folds. Expand
The false vocal folds: shape and size in frontal view during phonation based on laminagraphic tracings.
The geometry of the false vocal fold region during phonation is important to the understanding of the aerodynamics and acoustics of voice. The shape and dimensions of this region during phonationExpand
Required number of tokens to determine representative voice perturbation values.
Results indicate that, except for the harmonics-to-noise ratio, generally, the less stable the voice, the greater is the number of tokens needed to obtain representative averages. Expand
Vortical Flow Field during Phonation in an Excised Canine Larynx Model
These vortical structures were consistently found during specific phases of the glottal cycle for 3 canine larynges that significantly varied in size, suggesting that the vortices may be important for both vibration and sound production; however, further study is needed to prove this. Expand
Development and validation of a voice disorder outcome profile for an Indian population.
The conclusion of this study is that Voice-DOP is a sufficiently reliable and valid tool to measure voice disorder outcomes in the Indian population. Expand
Some technical considerations in voice perturbation measurements.
The maximum theoretical quantization noise (shimmer and jitter) for digital recording systems is estimated and compared with normal vocal shimmer and jitters, and a window of at least 20 cycles is suggested. Expand
Phonatory control in male singing: a study of the effects of subglottal pressure, fundamental frequency, and mode of phonation on the voice source.
It was found that the main physiological variable underlying loudness variation is subglottal pressure (Ps), and the voice source property determining most of the louds variation is the amplitude of the negative peak of the differentiated flow signal, as predicted by previous research. Expand