【作者】 焦映厚； 李明章； 陈照波； 陈兴帅；

【Author】 JIAO Ying-hou LI Ming-zhang CHEN Zhao-bo CHEN Xing-shuai (Institute of Vibration and Noise Control,Harbin Institute of Technology, Heilongjiang Harbin 150001)

【机构】 哈尔滨工业大学振动与噪声控制研究所；

【摘要】 采用大型声学测试分析软件SYSNOISE,对二次剩余扩散型声屏障在1/3倍频程内的插入损失进行了研究,并与其他类型的声屏障在刚性表面情况下进行了比较。结果表明:此种声屏障可以明显改善声屏障的降嗓效果,其最大A计权插入损失比现有直立型声屏障高出3～5分贝;在设计频率范围内能够获得满意的插入损失,在未使用任何吸声材料的情况下,表现出良好的吸声效果,其中以400Hz为设计频率的声屏障降噪效果最明显。更多还原

【Abstract】 The acoustic performance of noise barrier with quadratic residue diffuser type is investigated.A 2D boundary element method is used to calculate the barrier insertion loss by SYSNOISE.The results of rigid coverage are also calculated for comparisons and the results show that this kind of barrier can improve the efficiency of barrier.It is found that lowering the design frequency could get higher broadband mean insertion loss,and therefore the most efficient design frequency is around 400Hz.更多还原