摘要
在对车流量较低的高速公路声屏障进行声学测量时,发现声屏障的实际降噪效果低于传统理论计算值。分析了车流量对这种偏差影响的原因,提出了等效时间模型和利用无限长线声源、有限长声屏障绕射损失计算公式进行修正的方法。
In the acoustic measurements of highway noise barrier in the condition of low traffic flows, the problem that noise reduction of highway noise barrier is lower than the theoretical calculation is found. Analyse the reason of traffic flows effect on the deflection, give the equal time model and the calculative formula of diffraction loss of infinite line sound source and finite noise barrier in low traffic flows.
出处
《噪声与振动控制》
CSCD
北大核心
2006年第2期72-74,共3页
Noise and Vibration Control
关键词
声学
声屏障
车流量
插入损失
绕射损失
acoustics
noise barrier
traffic flows
insertion loss
diffraction loss
