DC Cooling fans, which are used in everyday-use equipment, have very high demands on the sound, making almost no noise. Is it possible that there is no sound at all?
In fact, the so-called mute, just say the sound is quiet. Silence in the cooling fan industry means below 25DB, 1 meter from the device for noise testing. In addition, the so-called noise, refers to the cooling fan operation wind, not really noise, if some silent fan noise is very large, indicating that the product itself is a problem.
