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Resonant voice: spectral and nasendoscopic analysis
Cara G Smith1, Eileen M Finnegan, Michael P Karnell
1Department of Speech Pathology and Audiology, Wendell Johnson Speech and Hearing Center, University of Iowa, Iowa City, IA 52242-1078, USA.
Journal of Voice : Official Journal of the Voice Foundation
|November 23, 2005
Summary
Resonant voice production involves specific vocal tract tuning, characterized by enhanced harmonics, but not consistently by laryngeal vestibule narrowing. This finding clarifies the physiology of resonant voice.
Area of Science:
- Speech and Hearing Sciences
- Acoustic Phonetics
- Vocal Pedagogy
Background:
- Resonant voice therapy is a common vocal training method.
- The physiological mechanisms and acoustic characteristics of resonant voice are not fully understood.
Purpose of the Study:
- To investigate the laryngeal and acoustic features of resonant voice.
- To test the hypothesis that resonant voice involves laryngeal vestibule narrowing and specific acoustic patterns.
Main Methods:
- Videonasendoscopy of the laryngeal vestibule during resonant and nonresonant /i/ vocalizations.
- Acoustic spectral analysis of recorded voice samples.
- Visual-perceptual analysis of videoendoscopic recordings.
Main Results:
- Resonant voice productions exhibited first formant tuning.
- Harmonic energy in the 2.0–3.5 kHz range correlated with voice quality (resonant-bright > resonant-relaxed > nonresonant).
- Laryngeal vestibule constriction was not consistently observed during resonant voice production.
Conclusions:
- Resonant voice is characterized by specific acoustic features, including first formant tuning and harmonic enhancement.
- Laryngeal vestibule narrowing is not a consistent physiological correlate of resonant voice.
- Findings contribute to understanding the acoustic and physiological basis of resonant voice.