Hebei elevator shaft absorbing panels supplier / manufacturer of sound-absorbing panels of the elevator shaft of the elevator shaft Europe and China absorbing cotton fiber fluffy staggered inside, there are a lot of tiny pores, is typical of porous sound-absorbing material, has good sound absorption properties. Centrifugal glass wool can be made into wall, ceiling, space absorber, etc., can absorb a lot of sound energy in the room, reducing the reverberation time, reduce indoor noise. Elevator shaft below the porous sound-absorbing cotton sound-absorbing material, with good acoustic performance. Centrifugal sound-absorbing glass wool can not due to surface roughness, but because a large number of internal and external communication of tiny pores and cavities. When sound waves incident on the glass wool, acoustic energy into the interior of the material along the pore, causing the air molecules vibrating space. Since the viscous resistance of air and air molecules and pore wall friction, sound energy into heat energy loss. Sound-absorbing cotton sound absorption performance of the elevator shaft and installation conditions also have a close relationship. Similarly, when the elevator shaft behind sound-absorbing cotton board air layer, the same thickness as the elevator shaft without air layer sound-absorbing cotton sound-absorbing effect. Especially in the low-frequency sound absorption performance than the material posted solid hard bottom surface is significantly increased, absorption coefficient increases with increasing thickness of the air layer, but to a certain value effect is not obvious. Using different density of glass wool and stacked together to form a bulk density increases in the form of greater absorption effect can be obtained. For example, a layer of 2.5cm thick 24kg / m3 and a layer of cotton board 2.5cm thick 32kg / m3 of cotton plate stack and absorption together better than 5cm thick layer of 32kg / m3 of cotton board. Usually within a public gymnasium, KTV halls, workshops and other large space, in order to use the elevator shaft when the acoustic noise absorbing cotton sound-absorbing main material. Person (name): Manager Li Phone (telephone): 0316-5781345 Mobile (mobile): 15631679888 Address (address): County of nine palaces remain small village of the town-mail (e-mail): 674123480@qq.com URL ( website): http: //www.ohbw.net