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一、前言 本钢发电厂汽机车间新厂房有两台大型风机。5~#风机是瑞士进口的新设备,出、入口有消音器,风机本身设有隔声罩;4~#风机是苏式老设备,出、入口及风机本身均无消音装置,是该车间的主要噪声源。现场噪声强度为92—105dB(A),其连续等效A声级为103dB,中、高频为主,为宽频带稳态噪声。该车间15年工龄以上工人按冶金系统“职业性耳聋诊断标准(试行)”诊断中、
First, the preface Bengang Power Plant steam workshop new plant has two large fans. 5 ~ # fan is a new equipment imported from Switzerland, the muffler out of the entrance, the fan itself with noise enclosures; 4 ~ # fans are old Soviet-style equipment, out of the entrance and the fan itself, there is no muffler device is the workshop The main noise source. The site noise intensity is 92-105dB (A). The continuous equivalent A sound level is 103dB, medium and high frequency are the main ones, and it is the steady-state noise of wide band. The workshop workers over 15 years of age according to the metallurgical system “diagnostic criteria for occupational deafness (Trial)” diagnosis,