Results of the PCA.

Conducted with varimax rotation and Kaiser normalization performed on a set of 120 trumpets from 6 individuals (20 per individual).该分析采用方差极大旋转（varimax rotation）与凯泽标准化（Kaiser normalization）方法，处理对象为来自6个个体的120份小号样本，每个个体对应20份样本。