【 A cooling fan 】 The noise of you, I to solve.
in addition to the heat dissipation effect, 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) 。 Measurement of ebm A cooling fan noise to the sound attenuation of noise is less than 17 db chamber, ebm cooling fans, one meter distance along the direction of the fan rotor on the fan air inlet, measured using A weighted way. Ebm spectrum characteristics of cooling fan noise 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.
the relevant recommendation: http:///products- power supply cooling fan manufacturer 细节。 asp吗? cpid = 101