【 Waterproof cooling fans 】 The noise of the solution
waterproof cooling fans, except for heat dissipation effect of fan noise is also a widely concerned problem. The size of the fan noise is generated when the fan noise, affected by various factors, the unit is decibels ( dB) 。 When measuring the noise of the fan needs in the sound attenuation of noise is less than 17 db and fan, one meter distance along the direction of the fan rotor on the fan air inlet, measured using A weighted way. The fan noise spectrum characteristics is also very important, so you also need to use spectrometer to record the noise of the fan frequency distribution, generally requires little as far as possible, the noise of the fan and cannot exist different sounds.
waterproof cooling fan, air flow noise and friction. Fan speed is higher, the air volume, the greater the noise caused by the will, the greater the additional waterproof and heat dissipation factors of the vibration of the fan itself is also cannot be ignored. Of course the high quality of fan vibration will be small, but the two in front of the person is difficult to overcome. To solve this problem, we can try to use the size bigger fan. Should be under the condition of the same volume, big fan work at low speed when the noise is smaller than small fan noise at high speed work. Another we easy to overlook the factor is waterproof cooling fan bearings. Because waterproof cooling fan high-speed rotation to friction between the shaft and bearing during collisions, so also is one of the main fan noise source.
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