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Respiratory and Laryngeal Changes With Vocal Loading in Younger and Older Individuals
Anusha Sundarrajan1, Jessica E Huber1, M Preeti Sivasankar1
1Department of Speech, Language, and Hearing Sciences, Purdue University, West Lafayette, IN.
Journal of Speech, Language, and Hearing Research : JSLHR
|August 25, 2017
Summary
Vocal loading impacts respiratory and laryngeal systems differently in younger and older adults, affecting speaking effort and vocal production mechanisms, potentially explaining vocal fatigue.
Area of Science:
- Speech and Hearing Science
- Gerontology
- Physiology
Background:
- Vocal loading, or prolonged voice use, can lead to vocal fatigue.
- Age-related changes may influence the vocal system's response to loading.
Purpose of the Study:
- To investigate the effects of age and vocal loading on respiratory and laryngeal function.
- To compare the physiological responses to vocal loading in younger and older adults.
Main Methods:
- Healthy younger (mean age 20) and older (mean age 75) adults underwent a 40-minute vocal loading challenge with background noise.
- Respiratory kinematics and laryngeal measurements were collected pre- and post-challenge.
Main Results:
- Both age groups reported increased speaking effort after vocal loading.
- Sound pressure level increased in older adults and decreased in younger adults.
- Younger adults showed altered lung volume usage, while older adults did not exhibit significant changes in this measure.
Conclusions:
- Vocal loading affects respiratory and laryngeal measures, with age-related differences in response patterns.
- Findings provide insight into physiological mechanisms underlying vocal fatigue.
- The study highlights age-specific adaptations and vulnerabilities in the vocal system under load.
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