Noise Analysis: When moving, increasing the distance between the vanes, the bit stream to reduce the influence of interference effects than the speed of change in the wake of faster 220v axial fan blade acts as a sound barrier will decrease with increasing distance from the small. Thus square axial fans, at least three parameters that affect the size of the interference noise: blade shape velocity waveform (ie blade loading), leaf area away from the radiation source and the sound of the blades as between columns. Very small pitch may have two acoustic impact. If the vanes on the rotor blades interference field force established to make the rotor blades into a pulsating sound source low noise axial fan, and vanes are sound barrier. DZ series low noise axial fan Product Description: DZ series low noise axial fan with large chord length wide blade axial fans, space warp, tilt leaf, from the sound source to start learning, the use of low-speed, high-pressure coefficient design wind, air pressure requirements, but also the fan with high efficiency, low noise, energy province, smooth running characteristics of methods to achieve the desired project. _ Chenyu square axial fans and air conditioning (certified) _ axial fan Cangzhou city by Wu Chen-yu air-conditioning Limited. 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.