著者

仁科 博之 Hiroyuki Nishina 仙台大学 Sendai College

出版者

仙台大学学術会

雑誌

仙台大学紀要 = Bulletin of Sendai College (ISSN:03893073)

巻号頁・発行日

vol.31, no.1, pp.1-5, 1999-10-01

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The mutation during puberty is generally known. However, there are few research numerical values to analyze the mutation. This research analyzed the mutation by measuring the differences of the Frequency. 436 school children were used as the object for this research. In this group the 9.13% boys and the 3.23% girls of them could not sing with musical scale, so they were unmeasurable. In elementary school children, there were no difference about voice region, the highest interval and the lowest interval between boys and girls. In junior high school children, voice regain of the 1st year boys become lower and narrower, and suddenly voice region of the 2nd year boys become the lowest and the narrowest. Next, voice region widen gradually for 3rd year high school students. There is a great difference between boys and girls. In the girl students, there are no sudden change like boys. Their voice region, the highest interval and the lowest interval are spread gradualy from the 1st year of junior high school to the 3rd year of high school.