以往大量的研究表明,在工程机械所有单一声源中柴油机的排气噪声是最大的声源之一。控制排气噪声可在排气管路中增设性能良好的消声器,不仅投资少,而且降噪效果好,因此工程机械的噪声控制最宜于从降低柴油机排气噪声做起。过去对柴油机排气消声器的研制主要依靠试验。这种方法虽然可以测得较为准确的消声性能,挑选出性能较好的消声器,但试验工作 In the past a large number of studies have shown that in all single engine construction machinery diesel exhaust noise is one of the largest sources. Control of exhaust noise Exhaust pipe can be added with good performance muffler, not only less investment, and noise reduction effect is good, so the construction machinery noise control is most appropriate to reduce noise from diesel exhaust start. In the past, the development of diesel exhaust mufflers mainly relied on experiments. Although this method can be measured more accurately anechoic performance, pick out a better performance muffler, but the test work