可实现宽频隔声的全向通风铁路声屏障
牛亚文,赵才友,易强,师多佳,郑钧元,陈嵘

Omnidirectional ventilation railway sound barrier capable of realizing wide frequency sound insulation
Ya-wen NIU,Cai-you ZHAO,Qiang YI,Duo-jia SHI,Jun-yuan ZHENG,Rong CHEN
图 7 传递损失和频率随内径的变化
Fig.7 Changes of transmission loss and frequency with inner diameter