Absorption coefficient of sound absorption material is relatively large building decoration materials. If the material connected to each other inside there are many fine voids, gaps formed by the air channel, to simulate the ground solid framework 
 Between the formation of many small tube or capillary tube structure formed. When sound waves pass, because of thin wall tube and pipe near the middle of the acoustic vibrations at different speeds, the speed difference between the medium caused by the internal friction 
 Rub, the acoustic vibration energy into heat energy which is absorbed. Good sound-absorbing material, mostly fibrous material, said porous sound-absorbing material, such as glass wool, rock wool, mineral ballast cotton, cotton and man-made fiber 
 Victoria Cotton, special metal fiber cotton, etc., but also the gap connected foam and the like. Sound absorption performance and void structure of fibrous materials, such as fiber thickness (microns to tens of microns 
 Rooms as well) and the material density (the decision between the fibers "capillary," the equivalent diameter), materials and materials within the air volume to volume ratio (known as voids, glass wool, 90% of the porosity 
 On), the shape of voids within the material structure. From the point of use, you can regardless of the mechanism of absorption, as long as access to material absorption coefficient results can be. Of course, when they pay attention in the selection of 
 Materials, moisture, fire and other requirements can be decorative. 
 Contact: Xue-Wei Liu welcomed the cooperation; Phone: Email: 
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