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Acoustic correlates of dysphonia: type and severity
1Department of Communication, Auburn University at Montgomery, Alabama 36117, USA.
Journal of Communication Disorders
|October 6, 1997
Summary
This study accurately classified breathy, hoarse, and strained voice types using acoustic analysis. Voice characteristics like spectral noise and fundamental frequency help determine voice type and severity.
Area of Science:
- Speech and Hearing Sciences
- Acoustic Analysis
- Voice Disorders
Background:
- Clinical voice types (breathy, hoarse, strained) present distinct acoustic characteristics.
- Objective acoustic measures are crucial for understanding and classifying voice pathologies.
Purpose of the Study:
- To investigate the acoustic discrimination of three clinical voice types.
- To explore the graded severity of these voice types using acoustic parameters.
Main Methods:
- Acoustic analysis of 102 dysphonic vowel samples (/a/, /i/).
- Classification of voice types (breathy, hoarse, strained) by listeners.
- Utilized measures of perturbation and spectral noise.
- Employed discriminant analysis with four acoustic parameters: cepstral peak prominence (CPP), jitter standard deviation (SD-J), fundamental frequency (F0), and standard deviation of signal-to-noise ratio (SD-SNR).
Main Results:
- Acoustic parameters achieved 92% accuracy in classifying voice types.
- Voice type classification was significantly influenced by the interplay of spectral noise, fundamental frequency, and signal irregularity.
- Dysphonia severity correlated with similar acoustic parameters, irrespective of the specific voice type.
Conclusions:
- Acoustic analysis provides a reliable method for differentiating clinical voice types.
- Specific acoustic parameters (CPP, SD-J, F0, SD-SNR) are key indicators of voice type and severity.
- Findings contribute to objective voice assessment and understanding of voice disorders.