The Changes in the Closed Qutient of Trained Singers and Untrained Controls Under Varying Intensity at a Constant Vocal Pitch

Kim, Han-Su; Jeon, Yong-Sun; Chung, Sung-Min; Cho, Kun-Kyung; Park, Eun-Hee

J Korean Soc Laryngol Phoniatr Logop > Volume 16(1); 2005 > Article

Journal of The Korean Society of Laryngology, Phoniatrics and Logopedics 2005;16(1): 28-32.

음도 고정 시 강도 변화에 따른 일반인과 성악인 발성의 성대접촉률 변화 특성의 비교

이화여자대학교 의과대학 이비인후과학교실

The Changes in the Closed Qutient of Trained Singers and Untrained Controls Under Varying Intensity at a Constant Vocal Pitch

Han-Su Kim, Yong-Sun Jeon, Sung-Min Chung, Kun-Kyung Cho, Eun-Hee Park

Department of Otolaryngology, Ewha Womans University College of Medicine

ABSTRACT

Background and Objectives
: The most important two factors of the voice production are the respiratory function which is the power source of voice and the glottic closure that transform the air flow into sound signals. The purpose of this study was to investigate the differences between trained singers and untrained controls under varying intensity at a constant vocal pitch by simulataneous using the airway interruption method and electroglottography(EGG).
Materials and Method
s : Under two different intensity condition at a constant vocal pitch(/G/), 20(Male 10, Female 10) trained singers were studied. Mean flow rate(MFR), subglottic pressure(Psub) and intensity were measured with aerodynamic test using the Phonatory function analyzer. Closed quotients(CQ), jitter and shimmer were also investigated by electroglottography using Lx speech studio. These data were compared with that of normal controls.
Results
: MFR and Psub were increased on high intensity condition in all subject groups but there was no statistically significance. Statistically significant increasing of CQ. were observed in male trained singers on high intensity condition (untrained male : 51.31${pm}$3.70%, trained male :55.52${pm}$6.07%, p=.039). Shimmer percent, one of the phonatory stability parameters, was also decreased statistically in all subject groups(p<.001).
Conclusion
: The trained singers' phonation was more efficient than untrained singers. The result means that the trained singers can increase the loudness with little changing of mean flow rate, subglottic pressure but more increasing of glottic closed quotients.

KEY WORDS： Voice training;Speech acoustics;