"24V DC Cooling Fan" is also bigger, and will increase as the wind speed was increased acceleration. Ordinary axial fan airflow generated flyback gap between the outer frame of the fan to produce wind noise while larger, more air volume will cause no impact, but also precisely because of the emergence of the edge off the side into the wind, etc. improved design. "24V DC Cooling Fan" main impact of noise is reflected in the user's health and safety above, but with the accompanying noise vibration may cause the wafer wear loose interface, disc scratches and other phenomena threatening to use. When choosing a fan, the fan should be concerned about noise, require naturally the smaller the better. But the noise information "24V DC Cooling Fan" parameter in the product manufacturers to offer, there is often a gap and the actual use of the results, not directly to the subject, which is mainly due to the industry-standard method for measuring the actual use of the environment exist Pan poor due.