This part prevents from forming resonate mode and enables to get the original scales which differ from all sorts of Japanese ones, not to mention the temperament in the West, as well as an extremely high pitched sound called hishigi.
この部分のために、共鳴モードの成立が妨げられ、西洋の平均律はもちろん、日本の各種音階とも異なる独特の音階と、極めてかん高いヒシギ音が得られる。