2005 年 第 6 期 段金明 周敬宣: 国外道路声屏障结构形式的研究进展 — 193 —
[7] Defrance J, Jean P. Integration of the efficiency of [12] Fujiw ara K, Ishiduka T. Noise Shielding Efficiency
noise barrier caps in a 3D ray tracing method. Case of of Barrier w ith M ultiple A borbing Edge Obstacles
a T2shaped diffracting device [