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Investigation of Vocal Fatigue Using a Dose-Based Vocal Loading Task.
Zhengdong Lei1, Laura Fasanella1, Lisa Martignetti2
1Department of Mechanical Engineering, McGill University, Montreal, QC H3A 0C3, Canada.
Applied Sciences (Basel, Switzerland)
|March 6, 2020
Summary
This study introduces a new quantitative vocal loading task to assess vocal fatigue. The novel method effectively quantifies voice use and shows consistent vocal fatigue patterns, validating its use in research.
Area of Science:
- Speech and Hearing Sciences
- Voice Research
- Occupational Health
Background:
- Vocal loading tasks are crucial for understanding voice use and fatigue in lab settings.
- Existing methods lack quantitative, dose-based evaluation for vocal fatigue.
Purpose of the Study:
- To investigate a novel quantitative dose-based vocal loading task for vocal fatigue evaluation.
- To assess the effectiveness of this new task in a controlled laboratory setting.
Main Methods:
- Ten female subjects underwent six 30-minute vocal loading sessions.
- Voice use was quantified using an online vocal distance dose calculator.
- Voice quality was assessed using Consensus Auditory-Perceptual Evaluation of Voice (CAPE-V) and Subjective Voice clinician Rating (SAVRa), alongside fatigue symptoms.
Main Results:
- Subjective voice quality ratings (overall severity, roughness, strain) from CAPE-V and SAVRa showed similar trends, increasing and then slightly decreasing.
- Quantitative neck accelerometer metrics mirrored these trends.
- Results indicated an initial vocal adjustment followed by vocal saturation.
Conclusions:
- The proposed quantitative dose-based vocal loading task is effective for evaluating vocal fatigue.
- The task demonstrates consistent patterns of vocal adjustment and saturation, supporting its validity in research settings.
