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Technical information Air-Conditioning Fan noise

Fan noise

Centrifugal fans produce most of noise at low frequencies, while the axial generation of high-frequency noise. Fans with high tip speed of generation of noise levels, which may require attenuation. The normal treatment for this problem is to meet are in ducts lined with absorption material on output or on both sides of the fan. Such treatment should be selected for the specific application, relating to the frequency of generated noise and the amount of attenuation is required...
 
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