Changes in design of musical instruments and their acoustical bases : From the Shousouin shakuhachi to modern shakuhachi

以声学理论、实验和CT图像分析为基础，考察了从寿原到现代的尺八的结构和设计，确定了尺八的变化过程。特别是，首相府尺八的7^< >指法（3^< 3 >和6^< >音孔交叉指法）存在问题，江户和明治时代的著名古董尺八通过竹节的离开度进行了很好的调音。此外，对唐代中国音乐的调查显示，寿隐尺八的音孔系统使传统的28音阶演奏成为可能。

The process of changes in shakuhachi was made definite by considering the structures and designs of shakuhachis(from the Shousouin to modern shakuhachi) based on acoustical theory, experiment, and pictorial analysis of the CT data. Particularly, it was demonstrated that the 7^<th> fingering(a cross fingering of 3^<rd> and 6^<th> tone holes open) of the Shousouin shakuhachi was problematic and famous antique shakuhachis in the Edo and Meiji era were well tuned by the leaving degree of bamboo joints. Moreover, an investigation of Chinese music in the Tang dynasty led an insight that the tonehole system of the Shousouin shakuhachi made it possible to play traditional 28 scales.