In the process of using a DC fan, in addition to paying attention to the heat dissipation effect, it is also necessary to pay attention to the working noise of the cooling fan, which is a problem that people are more concerned about.

Fan noise refers to the amount of noise generated by the cooling fan when it is working. It is affected by many factors, and its unit is decibel (dB). When measuring the noise of a cooling fan, it is necessary to perform noise treatment in an anechoic room with a noise of less than 17dB, one meter away from the fan, and align the fan's air inlet along the direction of the cooling fan's shaft, and use a weighted method for measurement. Since the spectral characteristics of the noise of the cooling fan are also very important, it is necessary to use a spectrum analyzer to record the noise frequency distribution of the fan. Generally, the noise of the fan is required to be as small as possible, and there should be no abnormal noise.
In summary, the problems that should be paid attention to in the use of DC fans, I hope it will be helpful to everyone.