Six proportional to the total noise level of the fan blade speed. FRP axial fan recognized brand according to the analysis, the fan noise source is basically a dipole nature. Further to the introduction of good material FRP axial fan, the noise is due to the effect on the blades on the fan air flow through the veins caused power. Fans may think there are two discrete frequency noise source, a field with the pressure caused by the movement of the rotor blade propeller noise, and the other is powered leaf veins aerodynamic noise caused by interference. Wind maneuver, quiet distance between the blades is an important factor interference noise. When this distance is very small lift pulsating, bit stream and trail changes will have an impact, the blades may also be effective as a sound barrier FRP axial fan, and strengthen the adjacent blade rows of blades to generate acoustic radiation. This effect depends on the lift pulsation-related acoustic wavelength as compared with the size of the blade barrier. Within this ratio is more than 2 frequency range, due to the impact caused by changes in the intensity of radiation is the most significant. Therefore, when the upstream and downstream of the radiation noise of the blade has the same number of leaves, and the leaves of the two columns of each of the blades on both sides of the source and at the same time constituting a sound barrier with a rotor blade meet, this effect will be stronger. FRP axial fan Suppliers | Hengshui FRP axial fan | Rich ventilation equipment provided by Dezhou Plumper ventilation plant. Dezhou Plumper ventilation plant (www.frtfsb.com) (www.frtfsb.com) strong, credible, in Dezhou fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Plumper ventilation equipment into the brilliant and you work for a better future!