Fire sound-absorbing panels wholesale elevator shaft 1 Introduction Edit the elevator shaft is designed for acoustical panels elevator shaft, room design, production of insulation material, the core material as a yellow glass wool fibers, glass wool as a long-term widely used in the world of acoustic materials, proved to have excellent absorption properties, and excellent fire performance, its surface complex absorption particles. The main role is to enhance the absorption effect, but also easy to install. Acoustic panels elevator shaft shape convex type, this special structure increases the effective absorption area, but also changed the reflection effect, sound noise reduction coefficient NRC = 0.75, is mainly applied to the elevator shaft, the elevator machine room, air-conditioned room, etc. each particular structure acoustic noise reduction processing. And nontoxic, it is the real green absorption decorative plates. 2 acoustic principle editor of the elevator shaft absorbing cotton fiber fluffy staggered inside, there are a lot of tiny pores, it 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. 3 edit acoustic board material absorption coefficient absorption coefficient, according to GB / T20247-2006ISO 354: 2003 "Acoustic reverberation chamber absorption measurement" noise reduction coefficient: NRC = 0.85, attracting performance sound absorption structure is level. (NBR≥0.85) frequency / HZ 100 125 160 200 250 315 400 500 630 a NBR absorption coefficient 0.38 0.48 0.51 0.84 0.86 0.82 0.92 0.87 0.80 0.77 0.85 Frequency / HZ 800 1000 1250 1600 2000 2500 3150 4000 5000 a NBR absorption coefficient 0.81 0.80 0.76 0.86 0.87 0.87 0.85 0.80 0.76 0.77 0.85 a1, as 100-5000HZ average absorption coefficient. a2, NBR for the noise reduction coefficient, is 250,500,1000,2000HZ 4 octave band sound absorption coefficient arithmetic mean goods. 4 construction principle for editing and sound absorbing panels inside an elevator shaft can be directly used special stapling, simple installation, construction efficiency is very high, but this product can also be composed of other wall materials, insulation wall or ceiling insulation 5 main Uses Edit mainly applicable to all types specific structure of the elevator shaft, the elevator machine room, air-conditioned room and other sound absorbing noise reduction. And nontoxic, is the real green absorption decorative plates and insulation materials Ltd. Langfang Hui ___ fire sound-absorbing panels wholesale elevator shaft