【摘要】 煤矿风井轴流风机气流速度大,扩散口噪声辐射强度高达113dB(A),降噪难度较大的低频成份突出。正确合理的低频噪声控制设计计算是噪声控制成功的关键。更多还原

【Abstract】 Noise level as high as 113dB(A) generated by air current of axial flow fan at the outlet of ventilation shaft of a coal mine poses big environment problems. Characterized by low frequency, the noise is abated by using specially designed equipment. Calculation involved in the design is described with discussions.更多还原