Immediate vocal effect under phonatory effort and semi-occluded vocal tract with high resistance tube in patients with Parkinson’s disease
DOI:
https://doi.org/10.23925/2176-2724.2025v37i2e69771Keywords:
Parkinson’s disease, Voice, Voice training, Speech acoustics, DysphoniaAbstract
Introduction: Parkinson’s disease (PD) is characterized by the presence of involuntary trembling movements, decreased muscle strength, and changes in gait, voice, and speech. Objective: to compare the immediate effect of phonatory effort exercises and semi-occluded vocal tract with a high-resistance tube on vocal parameters of patients with Parkinson’s disease. Methods: 20 patients with PD, both sexes, 10 in the Semi-occluded Vocal Tract Exercise (SOVTE) group, and 10 in the Phonatory Effort Exercise (PEE) group. Voice was assessed in terms of perceptual parameters and acoustic analysis of the voice. Statistics were used to compare the groups and the moments before and after the exercise. Results: the auditory-perceptual evaluation showed improvement after the exercise with gain in the immediate effect for the general degree and roughness in both groups; for breathiness and instability, there was a decrease in the gain after the exercise for the SOVTE and PEE groups. In the acoustic analysis, the gain after exercise showed a slight decrease in f0 for SOVTE, associated with decreased tension and adjustments in the vocal tract, and in the EPS there was an increase in f0, related to hyperactivity of the vocal fold tensor muscles. Intensity showed an increase for both groups, due to the increase in subglottic air pressure and improvement in vocal fold adduction. Conclusion: a similar benefit was recorded for vocal parameters analyzed both after EPS and SOVTE, in patients with PD.
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