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Continuous model for vocal fold oscillations to study the effect of feedback
R Laje1, T Gardner, G B Mindlin
1Departamento de Física, FCEyN, UBA, Ciudad Universitaria, Pab. I (1428), Buenos Aires, Argentina.
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|December 12, 2001
Summary
Delayed feedback in vocal fold models, even simplified ones, significantly impacts vocal fold dynamics. This research highlights how acoustic reflections can generate complex vocal behaviors.
Area of Science:
- Acoustics
- Bioacoustics
- Voice Production
Background:
- Understanding vocal fold dynamics is crucial for voice production.
- Acoustic feedback mechanisms in the vocal tract are complex.
- Simplified models are valuable for studying fundamental vocal fold behaviors.
Purpose of the Study:
- To investigate the impact of delayed feedback on simplified vocal fold models.
- To analyze how acoustic reflections influence vocal fold dynamics.
- To explore the emergence of complex dynamics from simple vocal fold models.
Main Methods:
- Development of a simplified vocal fold model.
- Incorporation of delayed feedback simulating vocal tract acoustic reflections.
- Analysis of the resulting vocal fold dynamics.
Main Results:
- Delayed feedback introduces rich and complex dynamics into vocal fold oscillations.
- Even minimal models demonstrate sensitivity to feedback delays.
- The spectral characteristics of human vocal production are retained.
Conclusions:
- Delayed feedback is a key factor in generating complex vocal fold dynamics.
- Simplified models can reveal fundamental principles of voice production.
- Acoustic reflections play a significant role in vocal behavior.