装载机柴油机工作过程中，在排气阀处，气体的流动是不稳定的，它以压力波动的方式，传到排气系统的出口，在尾管出口处，连速度波动产生了辐射噪声，主要包括三个方面，一是管壁的辐射噪声，二是消音器壁的辐射噪声，还有就是尾管出口的启动辐射噪声。
Shandong loader diesel engine operation, the exhaust valve at the gas flow is unstable, it is a way to pressure fluctuations, reached the exit of the exhaust system, the tail pipe exit, even the speed fluctuations of the radiated noise mainly includes three aspects, namely radiated noise wall, the second is radiated noise muffler wall, there is a tail pipe exports started radiated noise.

 装载机产生的排气噪声主要是排气系统辐射出来的总噪声，若将排气系统的管壁和消音器壁假设为刚性的，则排气噪声指的是仅气体动力性噪声。降低排气噪声最有效方法就是设计安装一个高效、低阻力的排气消音器。影响排气噪声的主要有发动机转速、气缸数、负荷、排气管尺寸等。
Shandong loader exhaust noise generated by the exhaust system is mainly radiated out of the total noise, when the wall of the exhaust system and muffler wall is assumed to be rigid, the exhaust noise refers only aerodynamic noise. The most effective way to reduce exhaust noise is the design and installation of a high efficiency, low resistance of the exhaust muffler. Exhaust noise affect mainly the engine speed, number of cylinders, load, exhaust pipe size and so on.