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Squeezed waveguides as a framework to study vowel-like acoustic resonances
A Eliraki1, F Vixege1, X Pelorson1
1Université Grenoble Alpes, Centre National de la Recherche Scientifique, Grenoble Institut National Polytechnique, Laboratoire des Écoulements Géophysiques et Industriels, Grenoble, France.
The Journal of the Acoustical Society of America
|January 13, 2026
Summary
This study introduces a squeezed waveguide vocal tract (SWVT) model to analyze vocal tract acoustics. The framework links smooth area functions and acoustic resonances, enabling better study of vowel-like sounds.
Area of Science:
- Acoustics
- Bioacoustics
- Speech Science
Background:
- Traditional vocal tract studies use limited, static data.
- Discontinuous area functions hinder dynamic vocal tract analysis.
Purpose of the Study:
- Introduce a theoretical squeezed waveguide vocal tract (SWVT) framework.
- Analyze the relationship between acoustic resonances and smooth area functions.
- Investigate vowel-like vocal tract configurations with constrictions.
Main Methods:
- Developed a theoretical SWVT framework.
- Established relevance of seven SWVT parameters (constriction positions, degrees, extents, waveguide length).
- Conducted experiments with rigid, static, and deformable molded waveguides.
Main Results:
- Validated the SWVT framework through theoretical analysis and experiments.
- Demonstrated the link between SWVT parameters and acoustic resonances up to 4-5 kHz.
- Molded waveguide allows study of full constriction degrees.
Conclusions:
- The SWVT framework effectively models vocal tract acoustics.
- Provides a basis for studying the aero-acoustic-geometry relationship in dynamic configurations.
- Enables more accurate analysis of speech production and sound generation.
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