2005 Fiscal Year Final Research Report Summary
Analysis of the relationship between glottal vibration and glottal velocity just above the glottis
| Project/Area Number |
16591708
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Otorhinolaryngology
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| Research Institution | National University Corporation Tottori University |
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Principal Investigator |
KATAOKA Hideyuki Tottori University, Faculty of Medicine, Assistant Professor, 医学部附属病院, 講師 (00224436)
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| Co-Investigator(Kenkyū-buntansha) |
KITANO Hiroya Tottori University, Faculty of Medicine, Professor, 医学部, 教授 (20153108)
SUZUKI Toyohiko Tottori University, Faculty of Engineering, Professor, 工学部, 教授 (60032273)
ARII Shiro Tottori University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (80222751)
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| Project Period (FY) |
2004 – 2005
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| Keywords | hot-wire anemometry / high-speed imaging / glottal velocity / glottal vibration |
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| Research Abstract |
Objectives : The aim of this study is to analyze glottal velocity and the glottal area. For this purpose, we have developed a miniature, flexible, hot-wire probe that can make truly instantaneous measurements of the in vivo human larynx. The tip of the miniature hot-wire is inserted into a flexible transnasal endoscope. Methods : A miniature hot-wire tip was inserted into a flexible transnasal endoscope. Fiberscopic examination was performed transnasally to observe glottal vibration using high-speed imaging. The tip of the hot-wire probe was placed just above the glottis. The position of the probe was carefully monitored and checked with another flexible endoscope. Results : Changes in velocity were recorded periodically. The maximum velocity of a comfortable voice is about 10 m/s. Velocity is higher in close proximity to the vocal cords. High-speed motion pictures were taken at a rate of 2000 frames per second using an auxiliary light source. Conclusions : Quantitative analysis of glottal velocity is required to improve our understanding of the relationship between laryngeal physiology and acoustics in humans. To solve the problem of synchronization inaccuracy, glottal velocity was captured instantaneously in the high-speed imaging system's processor memories.
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