453 咽頭内呼気流速変動による声帯振動基本周波数の測定

概要

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The vibration of vocal folds results in the sound source for all voiced sounds in speech. This vibration is induced by the air that is expelled through glottis, and causes a series of the pulses of the flow of the air. These pulses excite vocal tract and bring about the passive resonance of the vocal tract in all voiced sounds. Therefore, the quality and features of voiced sounds are dependent upon the properties of the vocal fold vibration. In this paper we describe an experimental study of the vocal fold vibration. In order to examine the vocal fold vibration, the fluctuation of the velocity of the air near the vocal folds in pharynx is directly measured by using a constant temperature anemometer. Because the fluctuation is induced by the series of the pulses, the frequencies of the fluctuation correspond to the vibration of the vocal fold. The experimental results showed that the vibration of the vocal fold was clearly measured by the fluctuation of the velocity of the air. Furthermore, the effect of the pitch of the voice on the frequency of the vocal fold vibration was confirmed.
社団法人日本機械学会の論文
2003-09-15