Voice production model employing an interactive boundary-layer analysis of glottal flow

Tokihiko Kaburagi, Katsunori Daimo, Shogo Nakamura

Research output: Contribution to journalConference article

Abstract

A voice production model has been studied by considering essential aerodynamic and acoustic phenomena in human phonation. Acoustic voice sources are produced by the temporal change of volume flow passing through the glottis. A precise flow analysis is therefore performed based on the boundarylayer approximation and the viscous-inviscid interaction between the boundary layer and core flow. This flow analysis can supply information on the separation point of the glottal flow and the thickness of the boundary layer, which strongly depend on the glottal configuration, and yield an effective prediction of the flow behavior. When the flow analysis is combined with a mechanical model of the vocal fold, the resulting acoustic wave travels through the vocal tract and a pressure change develops in the vicinity of the glottis. This change can affect the glottal flow and the motion of the vocal folds, causing source-filter interaction. Preliminary simulations were conducted by changing the relationship between the fundamental and formant frequencies and their results were reported.

Original languageEnglish
Pages (from-to)764-767
Number of pages4
JournalProceedings of the Annual Conference of the International Speech Communication Association, INTERSPEECH
Publication statusPublished - Nov 26 2009
Event10th Annual Conference of the International Speech Communication Association, INTERSPEECH 2009 - Brighton, United Kingdom
Duration: Sep 6 2009Sep 10 2009

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Glottis
Vocal Cords
Acoustics
Boundary layers
boundary layer
Phonation
Aerodynamics
Acoustic waves
Pressure
acoustic phenomena
fold
analysis
acoustic wave
aerodynamics
acoustics
filter

All Science Journal Classification (ASJC) codes

  • Human-Computer Interaction
  • Signal Processing
  • Software
  • Sensory Systems

Cite this

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