歌唱者の練習時間と喉頭所見に関する研究
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On 200 students (male and female were at the same rate) of an Academy of Music, the authors investigated their methods of the practice of singing and their subjective fatigue following the practice. In the second place, larygoscopic examination was carried out on 99 out of them befor and after their practice of singing. The results were as follows: 1. Vast majority of the subjects had the practice for 1 hour each day; thirty minuites each time with intermission of 10 minutes. 2. Signs of dysphonia due to over-practice were noticed in case they had the practice over 3 hours, a day. 3. The subjects complained of fatigue when they practised for 1 hour each time or 2 to 3 hours. each day. 4. It was revealed by laryngoscopic examination that hyperemia in the vocal cords easily manif- ested itself following the practice, while edema was hardly elicited by the practice. Moreover, am appreciable parallelism was found between the grade of subjective fatigue and hyperemia in the. vocal cords. On the other hand, fatigue and edema seemed to have no definite relation to each other. 5. There existed some certain, common tendency as to subjective fatigue, viz., fatigue was ratherr marked in the female as compared with male; being independent of sex, it was more notable in soprano or tenor than in alto or basso, and in those having long vocal career, fatigue was less marked even after vocal practice. 6. Edema in the vocal cords was more incident to alto or basso than to soprano or tenor.
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