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Hybrid parametric-physiological glottal modelling with application to voice quality assessment
Carlo Drioli1, Federico Avanzini
1Dipartimento di Elettronica e Informatica, Università di Padova, Via Gradenigo 6/a, Padova, Italy. drioli@dei.unipd.it
Medical Engineering & Physics
|September 19, 2002
Summary
A new physical glottal model treats vocal folds as a damped mass-spring system. This model analyzes normal and pathological voices for improved voice quality assessment.
Area of Science:
- Acoustics
- Bioengineering
- Speech Science
Background:
- Understanding vocal fold dynamics is crucial for voice production.
- Existing models often lack physical constraints or comprehensive airflow interaction.
- Pathological voice conditions necessitate accurate modeling for diagnosis.
Purpose of the Study:
- To propose a physically constrained glottal model.
- To model vocal fold oscillation coupled with airflow interaction.
- To apply the model for analyzing normal and pathological voices and assessing voice quality.
Main Methods:
- Vocal fold modeling as a damped mass-spring oscillator.
- Incorporating a nonlinear block for airflow interaction.
- Utilizing a regressor-based functional with pitch-synchronous identification.
Main Results:
- The proposed model effectively simulates vocal fold dynamics.
- The model accounts for nonlinearities in airflow interaction.
- Analysis of voiced sounds from normal and pathological voices was performed.
Conclusions:
- The physically constrained glottal model offers a robust approach to voice analysis.
- The model facilitates the assessment of voice quality in normal and pathological conditions.
- This method provides insights into the physical mechanisms of voice production and deviation.