摘要
利用边界元法计算全反射以及全吸声型声屏障的插入损失,以探究屏体吸声性能对道路声屏障插入损失的影响.对于单侧声屏障,屏体的吸声性能对声屏障插入损失的影响主要体现在A计权的插入损失上,对线性声级插入损失没有明显的作用.对于双侧声屏障,因为屏体对远端声屏障的反射声的吸声作用,屏体的吸声性能可以改善双侧声屏障的插入损失,双侧全吸声声屏障与双侧全反射声屏障的线性声级和A计权声级插入损失的差值均在2.0～3.0dB.
BEM is introduced to predict the insertion loss of reflective absorptive noise barrier on the roadside. The sound absorptivecharacteristic of the noise barrier on one side has few effects onimprovement of A-weighted sound level insertion loss can be obtainedthe improvement of its linear sound level insertion loss, but the The improvement of insertion loss of the parallel noise barrier can beacquired by the utilization of sound absorptive barrier facade, the improvement is as high as 2.0 - 3.0dB both in A - weighted and linearsound level.
出处
《环境影响评价》
2015年第1期92-96,共5页
Environmental Impact Assessment
