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Published on: November 25, 2017
The phonatory deviation diagram: a novel objective measurement of vocal function
Glaucya Madazio1, Sylvia Leão, Mara Behlau
1Human Communication Disorders Department, Universidade Federal de São Paulo, São Paulo, Brazil. glaumadazio@uol.com.br
Summary
The phonatory deviation diagram (PDD) effectively distinguishes normal from rough, breathy, and tense voices. Voice quality deviations correlate with specific PDD quadrant placements, aiding in diagnosis.
Area of Science:
- Otolaryngology
- Speech and Hearing Sciences
- Acoustic Analysis
Background:
- Dysphonia, or voice disorder, presents with various qualitative changes like roughness, breathiness, and tension.
- Objective assessment of voice quality is crucial for accurate diagnosis and treatment planning.
- The phonatory deviation diagram (PDD) is a tool used to visualize voice characteristics.
Purpose of the Study:
- To determine the unique features of the phonatory deviation diagram (PDD) for classifying rough, breathy, and tense voice qualities.
- To assess the PDD's ability to differentiate between normal and dysphonic voices based on vocal characteristics.
Main Methods:
- Acoustic analysis of 196 adult voice samples (normal and dysphonic) using VoxMetria software.
- Perceptual auditory evaluation to determine predominant vocal quality and degree of deviation.
- Analysis of voice sample distribution within the phonatory deviation diagram (PDD) quadrants.
Main Results:
- Significant differences were found between normal and dysphonic voices (p < 0.001).
- Distinct PDD quadrant distributions were observed for rough, breathy, and tense voice qualities.
- PDD placement correlated with the type and severity of vocal deviation, with normal voices in the inferior left quadrant and more severe deviations in the superior right quadrant.
Conclusions:
- The phonatory deviation diagram (PDD) is a valuable tool for discriminating between normal and dysphonic voices.
- PDD quadrant positioning effectively reflects the specific type and degree of voice alteration, aiding in clinical assessment.
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