某企业的车间设置有两台25万m3/h的大型高压风机,车间生产流水线24小时连续生产。大型风机系统系车间的主要噪声源。该车间系大型钢结构封闭空间,吸声系数小,车间内噪声声级高。同时,由于车间距厂界较近,车间高压风机系统的噪声经由车间围护结构及烟囱口直接排放。车间位于厂界东部,紧邻厂区道路绿化带及高度为7m的水处理机房,与厂界之间约距离30m,烟囱出风口高32.4m。厂界外为城郊公路干道,城郊公路干道另 A business workshop set up two 250,000 m3 / h large high-pressure blower, workshop production line for 24 hours of continuous production. Large fan system is the main source of noise in the workshop. The workshop is a large steel closed space, sound absorption coefficient is small, the workshop noise level is high. At the same time, due to the fact that the workshop is close to the factory boundary, the noise of the high-pressure blower system of the workshop is directly discharged through the workshop enclosure structure and the chimney mouth. The workshop is located in the east of the factory, close to the factory road green belt and the height of 7m water treatment room, and the factory about 30m distance, the chimney outlet high 32.4m. Outside the factory community for the suburban highway roads, suburb highway another