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

根据声学理论、实验和对CT数据的图像分析，通过考虑尺八的结构和设计(从首音到现代尺八)，明确了尺八的变化过程。特别指出的是，江户尺八的第7指法(3^lt；rd&gt的交叉指法和6^>开调的音孔)是有问题的，江户和明治时代著名的古董尺八在竹节的离开程度上得到了很好的调谐。此外，对唐代中国音乐的调查发现，首圆尺八的音孔系统使传统的28度音阶成为可能。

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.