论文部分内容阅读
1.介绍本标准规定了测定公路载重汽车、载重牵引车及公共汽车车外最大噪声级的试验程序,测试环境及所用的仪器。附录中还刊有SAE对此类车辆推荐的最大噪声级。
1. INTRODUCTION This standard specifies the test procedures, test environment and equipment used to determine the maximum noise level of road vehicles, load tractors and buses outside the vehicle. The appendix also contains the maximum noise level recommended by SAE for such vehicles.