A noise barrier (also called a soundwall, sound berm, sound barrier, or acoustical barrier) is an exterior structure designed to protect inhabitants of sensitive land use areas from noise pollution. Noise barriers are the most effective method of mitigating roadway, railway, and industrial noise sources - other than cessation of the source activity or use of source controls.
Theory of Design
The acoustical science of noise barrier design is based upon treating an airway or railway as a line source. The theory is based upon blockage of sound ray travel toward a particular receptor; however, diffraction of sound must be addressed. Sound waves bend (downward) when they pass an edge, such as the apex of a noise barrier. Further complicating matters is the phenomenon of refraction, the bending of sound rays in the presence of an inhomogeneous atmosphere. Wind shear and thermocline produce such inhomogeneities.
| Frequency(Hz) | 100 | 125 | 160 | 200 | 250 | 315 | 400 | 500 | 630 |
| Sound Absorption Coefficient a | 0.21 | 0.24 | 0.36 | 0.41 | 0.64 | 0.81 | 0.98 | 1.02 | 0.96 |
| Frequency(Hz) | 800 | 1000 | 1250 | 1600 | 1600 | 2500 | 3150 | 4000 | 5000 |
| Sound Absorption Coefficient a | 0.91 | 0.96 | 1.05 | 1.12 | 1.12 | 1.10 | 1.04 | 0.99 | 0.94 |
Features
1, Soundproof function: sound insulation STC≥30-35
2, Noise absorption function: Using advanced centrifugal glass wool, Average noise reduction coefficient NRC≥0.95
3, Solid and steady: Using aluminum and steel post, wind resistance 1500N/m2
4, Anti-aging and anti-corrosion
5, we provide custom service as our customers' requirements
6. Aesthetic appearance---available in color options and shaping options
7. Economization---easy installation and money saved
8. Durability---good temperature stability, combustion and corrosion resistant
9. Self supporting--- mechanically located and therefore cannot suffer from adhesive failure
10. Application scope---railway, highway, city viaduct, residential quarter and related areas
Product Show
Packing Details
Packing Details : 1.pearl cotton as separation 2.carton for inner package 3.Container
Delivery Details : 1.Safety package
2.100% test before delivering (ensure the quality)
3.Item is shipped in about 15-30 working days against payment depends on the quantity
4.Tracking number will be sent to you as soon as we ship the product
Contact
Mike Chen
Nanjing MEISHUO Building Materials Co.,Ltd
ADD: No. 50, Dingjie, Pancheng, Pukou District, Nanjing, China
Web: http://njmeishuo.en.made-in-china.com
Tel: +86-15295732784
