We know that the quality of the double-ball cooling fan is very stable. The noise feedback is usually the cooling fan with oil bearing. Not long ago, a customer reported that the sample was noisy. What happened? Later, I learned that the customer uses a very high speed. Low, we can hear a small cooing sound. We know that this is the sound of the ball running. There are a few small beads in the ball bearing, which will produce sound when running. When the speed is very low, the wind noise is very small, and it can be quiet I can hear the sound of the ball, so if you want to avoid this sound, you must make the fan run faster, or switch to oil bearing. The characteristics of double ball bearings are long-term use, no change in noise, stable quality, and longevity. very long. The copyright of the dynamic information of the micro DC fan belongs to the cooling fan manufacturer. Please do not reprint the whole article. Any violation will be held for legal responsibility. If you need more information about the cooling fan manufacturer, please click on the product display.