Using the currently accepted acoustic formula, it can be inferred that the inside diameter of the Xian Qin bamboo pipe must be about 0.71 cun.

• 由此，根据声学公式，结合文献考证，计算了黄钟律管的管径，结论为：先秦律管应是竹管，管径范围约是0.；71寸。