关键词: 声学, 道路交通噪声, 源强模型, 本地模型, 噪声监测

Abstract:

Abstract: Prediction of road traffic noise source is the key to road traffic noise prediction. Because the vehicle conditions and road conditions in China are different from those in foreign countries, the direct application of the foreign models in China will reduce its accuracy. It is very difficult to obtain local model because of the demanding experimental site and the huge demand of the number of samples. Besides, the model based on standard experiment may not be suitable to the complex urban traffic flow. This paper proposed a simple and rapid method to establish a model accords with the characteristics of the local urban transport, which calculates the noise of the observation points, and then determines the optimal model parameters by optimizing algorithm. This method inversed the equivalent sound level to obtain the single-car sound power level model, which not only contained a wealth of samples, but also saved the measuring time. In this paper, a model was established and validated based on actual measured traffic data in Beijing, and the results showed that this method was fast, easy and with high accuracy.