(接上期)2筑路机械降噪技术的研究与进展相对于其他车辆来说,工程机械因功率较大,作业工况复杂且多变,造成工作过程中产生的噪声高且频带宽,对驾驶员及周围环境产生的影响较大。目前,我国国标规定的工程机械噪声限值比欧美等西方发达国家噪声限值要高3～8dB(A),导致国产工程机械在整机性能方面缺乏竞争力。下面以 (Continued) 2 road construction machinery noise reduction technology research and development relative to other vehicles, construction machinery because of the larger power, complex and varied working conditions, resulting in the work of high noise and bandwidth, the right The driver and the surrounding environment have a greater impact. At present, China’s national standard of construction machinery noise limit than Western Europe and other developed countries noise limit higher 3 ~ 8dB (A), resulting in the lack of competitiveness of domestic construction machinery in machine performance. Below