1.前言 “绿色”和“环保”已成为当前世界汽车行业的焦点。但在降低汽车排放的同时,不应忽视汽车噪声,其也是重要的环境污染源之一。只有排放污染与噪声污染都得到控制的车辆才算得上是纯粹的“绿色汽车”。本文就大客车的噪声源及降噪措施进行浅析。 2.有关大客车的噪声及其标准 大客车的噪声是影响其性能和质量的重要指标之一,一般分为两种:车外噪声和车内噪声。车外噪声在很大程度上对外部环境产生生态影响,而车内噪声则对乘客舒适性产生影 1. Introduction “Green” and “environmental protection” have become the focus of the current world automotive industry. However, while reducing vehicle emissions, car noise should not be neglected. It is also one of the important environmental pollution sources. Only vehicles with emission and noise pollution under control can be regarded as pure “green cars.” This paper analyzes the bus noise source and noise reduction measures. 2. The bus noise and its standard bus noise is one of the important indicators of its performance and quality, generally divided into two types: noise outside the car and noise. Noise outside the vehicle to a large extent on the external environment have an ecological impact, while the noise inside the car has a passenger comfort