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Validating a psychoacoustic model of voice quality
Jody Kreiman1, Yoonjeong Lee1, Marc Garellek2
1Departments of Head and Neck Surgery and Linguistics, University of California-Los Angeles, Los Angeles, California 90095-1794, USA.
This study validates a new psychoacoustic model for objective voice quality measurement. The model accurately quantifies voice characteristics, offering a reliable tool for clinical and research applications.
Area of Science:
- Acoustics
- Speech Science
- Psychoacoustics
Background:
- Objective measurement of perceived voice quality lacks standardized methods.
- Existing methods do not fully capture the integral sound of a voice sample.
Purpose of the Study:
- To validate a novel psychoacoustic model for objective voice quality quantification.
- To establish a comprehensive method for analyzing voice characteristics.
Main Methods:
- Developed a psychoacoustic model incorporating parameters for harmonic/inharmonic voice sources, vocal tract transfer function, fundamental frequency, and amplitude.
- Utilized analysis-by-synthesis to fit the model to 200 voice samples (pathological and non-pathological).
- Conducted experiments to assess model dimensionality and perceptual accuracy.
Main Results:
- Synthetic voices generated by the model were indistinguishable from original voice tokens, indicating complete parameterization.
- Removing model parameters related to the harmonic voice source significantly worsened perceptual matches.
- The psychoacoustic model's dimensionality is essential for accurate voice quality representation.
Conclusions:
- The validated psychoacoustic model provides an objective and comprehensive method for quantifying voice quality.
- This model is suitable for diverse applications in clinical voice assessment and research.
- The model's parameters are crucial for accurately representing perceived voice quality.
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