A Sound Tube is a toy,consisting of a corrugated plastic tube, that you can spin around to producesounds. Study the characteristics of the sounds produced by such toys, and howthey are affected by the relevant parameters.
 声管是一种玩具，由波纹塑料管组成，你可以旋转声管产生声音。研究这些玩具发出的声音的特性，以及它们如何受到相关参数的影响。