Abstract
Empirical eigenfunctions obtained from high-speed imaging of the vocal folds
The Journal of the Acoustical Society of America, Vol.105(2_Supplement), pp.1304-1304
02/01/1999
DOI: 10.1121/1.424754
Abstract
Previously, the method of empirical eigenfunctions has been used to interpret both periodic and aperiodic oscillations from a finite-element model of vocal fold vibration. For a typical case of periodic vibrations from the model, it was shown that two eigenfunctions explained 98% of the variance of the nodal trajectories. Furthermore, the extracted eigenfunctions were qualitatively similar to analytic normal modes computed from a linear continuum model. Even for complex aperiodic oscillations, 85% of the variance could be explained by just three eigenfunctions. The method of empirical eigenfunctions is now applied to quantitative observations of vocal fold movement obtained from excised canine larynx experiments. With the aid of a high-speed imaging system (the Kodak EktaPro 4540), both periodic and aperiodic oscillations were captured. The newly calculated eigenfunctions will be presented, and contrasted with those obtained previously from finite element simulations. Hints of low dimensionality and mechanisms of irregular oscillation will be discussed. [Work supported by NIH, Grant No. R29 DC03072.]
Details
- Title: Subtitle
- Empirical eigenfunctions obtained from high-speed imaging of the vocal folds
- Creators
- David A. Berry - University of IowaIngo R. Titze - University of IowaHanspeter Herzel
- Resource Type
- Abstract
- Publication Details
- The Journal of the Acoustical Society of America, Vol.105(2_Supplement), pp.1304-1304
- DOI
- 10.1121/1.424754
- ISSN
- 0001-4966
- eISSN
- 1520-8524
- Language
- English
- Date published
- 02/01/1999
- Academic Unit
- School of Music; Communication Sciences and Disorders
- Record Identifier
- 9984719855902771
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