加速行驶车外噪声试验研究及我国载客汽车噪声水平分析

通过对加速行驶车外噪声源的分析，确定了发动机排气噪声和轮胎滚动噪声是目前汽车加速行驶的主要噪声源。在阐述了我国汽车加速行驶车外噪声的试验方法后，提出驾驶员操作是影响测量结果的最主要因素。结合大量试验测量数据，对比分析了GB1495-2002第二阶段噪声限值实施前后我国汽车加速噪声的变化，建议将加强M3类大型载客汽车的降噪研究工作作为今后我国大中型城市汽车噪声控制的重点。

An Experimental Study on Accelerating Noises and the Analysis on the Noise Level of Passenger Vehicles in China

The analysis on external noise emitted by accelerating vehicles ascertains that the engine exhaust system and rolling tyre are the main sources of vehicle accelerating, noises. The standard test method for vehicle acceleratingnoise in China is described and it is pointed out that the driver operation is the most important factor affecting noise test results. Based on a large number of test data, a contrast analysis is performed on the change in vehicle accelerating noise level before and after the enforcement of the second phase of GB 1495-2002. And a suggestion is also made that the focal point of vehicle noise control in large and medium cities in China should be put on strengthening the research on noise reduction for large passenger vehicles in M3 category.