Noise Analysis: six proportional to the total noise level of the fan blade speed square. According to the analysis cbf proof axial fans, fan noise source is basically a dipole nature. Further to the introduction of axial fans, 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. This series of products are widely used in industrial and mining enterprises, civil construction of the wall exhaust, post blast, explosion-proof axial fan ventilation duct model, if the cabinet to remove axial fans t35-11-4, fans can also be used freely, can also be a longer interval of the exhaust duct installed in series, to increase the pressure in the pipeline. Also used in chemical industry, light industry, food, medicine, metallurgy, power plants, transportation and warehousing workplace ventilation and air conditioning systems. Square wall axial fans | Chen Yu-conditioning (certified) | Baodi axial fans by Wu Cheng Chen Yu Air Conditioning Equipment Co.. Wu Cheng Chen Yu Air Conditioning Equipment Co., Ltd. (www.wccykt.com) is a leader in Dezhou, fans, ventilation equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs . Chen Yu-conditioning in leadership with the staff warmly welcome all inquiries negotiations to create Chenyu conditioning a better future.