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KMID : 0917520030100020111
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Journal of Speech Sciences
2003 Volume.10 No. 2 p.111 ~ p.128
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Comparative Evaluation of Electroglottography and Aerodynamic Study in Trained Singers and Untrained Controls under Different Two Pitch
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Ahn Sung-Yoon
Kim Han-Soo
Kim Young-Ho
Song Kee-Jae
Choi Seong-Hee
Lee Sung-Eun
Choi Hong-Shik
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Abstract
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Aerodynamic study is valuable information about the vocal efficiency in translating airflow to acoustic signal. The purpose of this study was to investigate the differences between trained singers and untrained controls under different two pitch by simultaneous using the airway interruption method and electroglottography (EGG). Under singing a Korean lied ’Gene’, 20 (Male 10, Female 10) trained singers were studied on two one-octave different tone. Mean flow rate (MFR) , subglottic pressure (Psub) and intensity were measured with aerodynamic test using the Phonatory function analyzer (Nagashima Ltd. Model PS 77H, Tokyo, Japan). Closed quotients (Qx), jitter and shimmer were also investigated by electroglottography using Lx speech studio (Laryngograph Ltd, London, UK). These data were compared with those of normal controls. MFR and Psub were increased on high pitch tone in all subject groups. Statistically significant increasing of Qx and intensity were observed in male trained singers on high pitch tone (Qx;p = .025, intensity;p < .001). Beacasue of increasing of Qx and intensity, vocal efficiency was also significantly increased in male singers (p < .001). 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.
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KEYWORD
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Trained Singers, Electroglottography, Aerodynamic Study, Frequency, Intensity, Mean Flow Rate, Subglottic Pressure, Closed Quotients
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