In addition to the cooling effect, the working noise of the fan is also a common concern. Fan noise is the size of the noise generated when the fan works, affected by a variety of factors, the unit is decibel (dB). Measurement of fan noise needs to be carried out in the noise less than 17dB muffler room, one meter away from the fan, and along the direction of the fan axis aligned with the fan's air intake, the use of A-weighted way to measure. The spectral characteristics of the fan noise are also important, so it is also necessary to record the frequency distribution of the fan noise with a spectrometer, which is generally required to be as small as possible, and there can be no abnormal sound.

Fan noise is related to friction and air flow. The higher the fan speed, the larger the air volume, the greater the noise caused by the fan, in addition to the fan's own vibration is also a factor that can not be ignored. Of course, high-quality fan's own vibration will be very small, but the first two are difficult to overcome. To solve this problem, we can try to use a larger size fan. Should be in the case of the same air volume, the larger fan in the lower speed of the working noise is less than the smaller fan in the high speed of the working noise. Another factor that we tend to ignore is the bearing of the fan. As the fan rotates at high speed, the friction and collision between the rotor shaft and the bearing is a major source of fan noise.

Dehuan Electronics is oriented to domestic and foreign direct to provide excellent thermal system application solutions and intimate thermal products and intimate service; thus the company is mainly to produce micro-motors, blowers; cooling fans, heat sinks, computer peripheral accessories, thermal conductivity of the material as the leading industry, set adhering to the original company design, research and development of the production and sales of a professional, modern and comprehensive enterprise.