The indirect sign included the stercolith in the appendix with sound shadow;
阑尾内粪石并声影；
The indirect sign includes the stercolith in the appendix with sound shadow;
阑尾内粪石并声影；
In this model, the noise field in sound shadow region is deduced by applying Huygens-Fresnel principle. It provides a new ideal for deducing the diffraction sound of complicated…
模型中对声影区的声场分布采用惠更斯-菲涅耳原理进行推导计算，给出的理论计算公式可为推导计算其它复杂声源的衍射声提供借鉴。
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