一般来说，工业风扇的转速、功率、风量、噪音等参数噪音是成正比的，也就是说工业风扇转速越高、功率就越大、风量也就越大，噪音随之也就变大，局部通风散热降温效果也就越好。

　　但不同品牌工业风扇厂家在转速、功率、风量、噪音等参数的测量上有很大的差距，实际上很难进行横向精确比较，只能依照我们生活经验去感觉了。

　　可以通过观察工业风扇在低速档、中速档尤其是在高速档转动时工业风扇马达头以及整机部分是否会抖动，同时仔细听工业风扇马达头部分是否有其它异响声(风声除外)，来判断工业风扇噪音是否在可接受的范围内，主要选择噪声小的工业风扇。

In general, the parameters of industrial fans such as speed, power, wind volume, and noise are proportional to each other. That is, the higher the speed of industrial fans, the greater the power, the greater the wind volume, and the greater the noise. The better the cooling effect of local ventilation heat dissipation.
However, different brands of industrial fan manufacturers have great differences in the measurement of parameters such as speed, power, wind volume, and noise. In fact, it is difficult to compare horizontally and accurately, and we can only feel according to our life experience.
You can observe whether the industrial fan motor head and part of the entire machine will shake at low speed, medium speed, especially at high speed, and listen carefully for other noise(except for wind) in the industrial fan motor head. To determine whether industrial fan noise is within an acceptable range, mainly select industrial fans with low noise.