Miniature cooling fanWhat are the main factors related to the generation of noise? How can we reduce the noise of miniature fans? Here, professional technicians from Shenzhen Yingtian Electromechanical Equipment Co., Ltd. will answer your questions:

    1. What are the main factors related to noise generation?The noise of micro fans is related to friction and air flow. The higher the speed and air volume, the greater the noise caused. In addition, the vibration of the micro fan itself cannot be ignored. Of course, high-quality micro fans have minimal self vibration, but the first two are difficult to overcome.

    2. How to measure the noise of a miniature cooling fan?Noise refers to the amount of noise generated by a miniature fan during operation, which is influenced by various factors and measured in decibels (dB). When measuring the noise of a micro fan, it is necessary to conduct the measurement in a soundproof chamber with a noise level of less than 17dB, one meter away from the fan, and align it with the air inlet of the fan along the direction of the micro fan shaft. The measurement is carried out using A-weighted method. The spectral characteristics of micro fan noise are also important, so it is necessary to use a spectrometer to record the frequency distribution of micro fan noise. Generally, it is required that the noise of micro fans be as small as possible and there should be no abnormal noise.

    3. How can we reduce the noise of miniature fans?To solve this problem, we can try using larger fans. Under the same air volume, the working noise of a large fan at lower speeds should be lower than that of a small fan at higher speeds. Another factor that we tend to overlook is the bearings of the micro fan. Due to the friction and collision between the shaft and bearings during high-speed rotation of micro fans, it is also a major source of noise for micro fans.