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Laryngeal adduction in resonant voice
K Verdolini1, D G Druker, P M Palmer
1Division of Otology and Laryngology, Harvard Medical School, and Massachusetts Eye and Ear Infirmary, Boston, USA.
Journal of Voice : Official Journal of the Voice Foundation
|October 8, 1998
Summary
Singers with and without vocal nodules can produce resonant voice with similar laryngeal configurations. However, electroglottographic closed quotient (EGG CQ) has limited utility for noninvasively distinguishing resonant voice types.
Area of Science:
- Laryngology
- Speech Science
- Acoustic Analysis
Background:
- Resonant voice is a vocal technique used by performers.
- Understanding the laryngeal configuration for resonant voice is crucial for voice production and therapy.
- The electroglottographic closed quotient (EGG CQ) is a potential noninvasive measure of vocal fold function.
Purpose of the Study:
- To compare laryngeal configurations for resonant voice production in subjects with and without vocal nodules.
- To determine if EGG CQ can differentiate resonant voice from other voice types (pressed, normal, breathy).
- To assess if EGG CQ can distinguish between healthy larynges and those with nodules.
Main Methods:
- Twelve adult performers (6 healthy, 6 with nodules) produced sustained vowels in resonant, pressed, normal, and breathy voice qualities.
- Laryngeal adduction was assessed via videoscopic examination and perceptual ratings.
- Electroglottographic closed quotients (EGG CQs) were calculated.
Main Results:
- Both healthy subjects and those with nodules produced resonant voice with a similar, distinct laryngeal configuration (barely adducted/abducted).
- EGG CQ distinguished resonant from pressed voice but not consistently from breathy voice.
- EGG CQ reliably differed between healthy subjects and those with nodules.
Conclusions:
- Resonant voice production may involve similar laryngeal configurations regardless of vocal fold health.
- EGG CQ's utility in noninvasively estimating resonant voice is limited, especially without calibration.
- EGG CQ differences between healthy and nodule groups suggest potential diagnostic value, but further research is needed.