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The inverse problem for the vocal tract: numerical methods, acoustical experiments, and speech synthesis
The Journal of the Acoustical Society of America
|March 1, 1983
Summary
Researchers can now estimate vocal tract area functions in real-time using acoustical measurements. This breakthrough enables visualization of speech articulation and the synthesis of intelligible speech from these measurements.
Area of Science:
- Acoustics
- Speech Science
- Bioacoustics
Background:
- Estimating vocal tract area functions is crucial for understanding speech production.
- Previous methods lacked real-time capabilities and efficient data processing.
Purpose of the Study:
- To detail novel measurement techniques and numerical procedures for vocal tract area function estimation.
- To demonstrate real-time visualization and speech synthesis applications.
Main Methods:
- Utilizing transient acoustical measurements at the lips.
- Developing numerical procedures for accurate area function computation.
- Implementing a system for rapid, high-frequency data acquisition and display.
Main Results:
- Achieved real-time estimation and display of vocal tract area functions at approximately 18 Hz.
- Successfully synthesized intelligible, continuous speech from measured area function sequences.
- Demonstrated the potential for visual feedback aids for speech therapy.
Conclusions:
- Real-time vocal tract area function estimation is now feasible.
- This technology opens new avenues for speech analysis, synthesis, and therapeutic applications.
- The study represents a significant advancement in speech science and technology.