【摘要】 分析了试验离心风机的噪声频谱特性 ,按其噪声特点和工作环境情况 ,采用在叶轮进口加金属网罩和风机进口加阻性消声器方法对其实施降噪试验 ,测得试验通风机的总噪声降低 4dB(A)。更多还原

【Abstract】 The frequency character of noise generated by the centrifugal fan is analyzed,and experiments on reducing the noise by equipping metal net masks in entrance of the vane wheel and equipping a resistant silencer in entrance of the fan are carried out.The result shows that the noise of the centrifugal fan is reduced 4dB(A).更多还原