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Perturbation measures of voice: a comparative study between Multi-Dimensional Voice Program and Praat
Youri Maryn1, Paul Corthals, Marc De Bodt
1Department of Speech-Language Pathology and Audiology, Sint-Jan General Hospital, Bruges, Belgium. youri.maryn@azbrugge.be
Summary
Comparing voice perturbation measures from different systems and software reveals significant differences. Results indicate that frequency and amplitude perturbation outcomes are difficult to compare across various acoustic analysis tools.
Area of Science:
- Acoustic analysis of voice production.
- Speech-language pathology and audiology.
- Biomedical engineering and signal processing.
Background:
- Voice perturbation measures (frequency and amplitude variations) are crucial for voice disorder assessment.
- The accuracy of perturbation measures is affected by recording equipment and analysis algorithms.
- Existing computer systems and software may yield different perturbation results.
Purpose of the Study:
- To compare voice perturbation measures obtained from two distinct computer systems and two widely used software programs.
- To evaluate the consistency and comparability of acoustic voice analysis tools.
- To identify potential discrepancies in frequency and amplitude perturbation assessments.
Main Methods:
- Analysis of seven perturbation measures: absolute jitter, percent jitter, relative average perturbation, pitch perturbation quotient, shimmer in decibels, percent shimmer, and amplitude perturbation quotient.
- Statistical comparison of data from 50 subjects with diverse voice disorders.
- Correlation and inferential statistical analyses were performed.
Main Results:
- Statistically significant differences were observed between the two systems and the two programs.
- The Multi-Dimensional Voice Program consistently produced higher perturbation measures compared to Praat.
- Correlation analyses revealed weak to moderate relationships between systems and weak to strong relationships between programs.
Conclusions:
- Direct comparison of frequency perturbation outcomes across different systems and programs is challenging.
- Amplitude perturbation outcomes are also difficult to compare across various acoustic analysis systems.
- Standardization of voice analysis methods is needed for reliable cross-system comparisons.
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