'Pay attention to the noise of the cooling fan' so that you no longer have to worry about buying!

'Pay attention to the noise of the cooling fan' so that you no longer have to worry about buying! u003cbru003e　　 In addition to the heat dissipation effect, the working noise of the cooling fan is also a common concern. The noise of the cooling fan is the size of the noise generated by the fan when it is working, which is affected by many factors, and the unit is decibel (dB). The noise of the cooling fan needs to be measured in an anechoic room with a noise of less than 17dB, one meter away from the ebm cooling fan, and aligned with the fan's air inlet along the direction of the fan shaft, and the A-weighted method is used for measurement. The spectral characteristics of the noise of the cooling fan are also very important. Therefore, it is necessary to record the noise frequency distribution of the fan with a spectrum analyzer. Generally, the noise of the fan is required to be as small as possible, and there should be no abnormal noise. u003cbru003eThe noise of the cooling fan is related to friction and air flow. The higher the fan speed and the greater the air volume, the greater the noise caused, and the vibration of the fan itself is also a factor that cannot be ignored. Of course, the vibration of a high-quality fan will be small, but the first two are difficult to overcome. To solve this problem, we can try to use a larger fan. When the air volume is the same, the working noise of a large fan at a lower speed should be smaller than that of a small fan at a high speed. Another factor that we easily overlook is the bearing of the fan. As the fan rotates at high speed, there will be friction and collision between the shaft and the bearing, so it is also a major source of noise from the cooling fan. u003cbru003e u003cbru003e u003cbru003e u003cbru003eRecommendation: Car AC fan http:///products-detail.asp?cpidu003d81