By Comparing the highway traffic noise prediction model of our country with foreign noise prediction models,we have improved our model of highways having hoise barriers on the roadside. As the linear sound source is regarded as the reiterative addifion of sound sources at many points. the angle-amendment factor is led into our newly made highway prediction model of Ministry of Communications. The predicted value before and after the improvement are also contrasted.%对交通部有声屏障公路噪声预测模型进行了改进.将公路线声源视为多个点声源的叠加,改进其张角修正量,将张角修正量引入到公路噪声预测模型中,并对模型改进前后的预测值进行了比较,证明随位置变化,原模型绕射损失较快.
展开▼
