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 一般來說，工業風扇的轉速、功率、風量、噪音等參數噪音是成正比的，也就是說轉速越高、功率就越大、風量也就越大，噪音隨之也就變大，局部通風散熱降溫效果也就越好。

　　但不同品牌工業風扇廠家在轉速、功率、風量、噪音等參數的測量上有很大的差距，實際上很難進行橫向精確比較，只能依照我們生活經驗去感覺了。

　　可以通過觀察工業風扇在低速檔、中速檔尤其是在高速檔轉動時工業風扇馬達頭以及整機部分是否會抖動，同時仔細聽工業風扇馬達頭部分是否有其它異響聲(風聲除外)，來判斷工業風扇噪音是否在可接受的范圍內，主要選擇噪聲小的工業風扇。

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.