对江苏镇江茅山苏南抗战胜利纪念碑爆竹爆炸引起“军号声”这一奇特现象进行了实地的测试，从声波干涉原理及梳状滤波原理出发，解释了声音由多级台阶反射叠加后形成“军号声”的基本原理。应用集合经验模态分解方法（EEMD），对多级台阶反射声信号进行时频分析，通过与实验室人工吹出军号声信号特征的分析结果做比较，得出“军号声”是由纪念碑及其前面多级台阶反射而引起的。%This paper conducted a field test at South Jiangsu N4A Monument in Zhenjiang city,Jiangsu Province for the peculiar phenomenon of the "bugle" caused by firecrackers explosion,explained the cause of the phenomenon that sound was superimposed by the reflection of multiple steps by the principle of sound wave interference and comb filtering principle. The steps reflected sound signal was studied by time-frequency analysis through EEMD (Ensemble Empirical Mode Decomposition) Method. Compared with the characteristic of the bugle signal analysis of artificial blowing, it is deduced that the"bugle"was caused by the monument and its front steps reflection.
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