Waterproof Cooling Fan how to distinguish between noise

Measure "Waterproof Cooling Fan" Another level of quality is the outward manifestation of the noise size. Imagine if you bought a lot of noise cooling fan, cooling fan, even if other properties are very good, his heart is not practical, because too much noise will greatly affect our operations mood computers. Cooling fan noise and fan size is usually related to the power, usually the greater the power, the faster the speed, then a negative impact on the performance out of it, and that is noise. Therefore, when we buy "Waterproof Cooling Fan", be sure to audition cooling fan noise, if too large, it is best not to buy; certainly noisy cooling fan, not necessarily a fan quality problems, there may be a fan no shaft lubrication or cooling fan is not installed correctly, and if that is the case, we'd be able to re-give "Waterproof Cooling Fan" position, or to the fan shaft with some lubricant to ensure its lubricating effect good.