| 超细玻璃棉属于多孔吸声材料，具有良好的吸声性能 |
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| 超细玻璃棉属于多孔吸声材料，具有良好的吸声性能。超细玻璃棉能够吸声的原因不是由于表面粗糙，而是因为具有大量的内外连通的微小孔隙和孔洞。当声波入射到超细玻璃棉上时，声波能顺着孔隙进入材料内部，引起空隙中空气分子的振动。由于空气的粘滞阻力和空气分子与孔隙壁的摩擦，声能转化为热能而损耗。 Superfine glass wool is a kind of porous sound absorption material with good sound absorption performance. The reason why superfine glass wool can absorb sound is not because of its rough surface, but because it has a large number of micro pores and holes connected inside and outside. When the sound wave is incident on the ultra-fine glass wool, the sound wave can enter the material along the pores, causing the vibration of air molecules in the gap. Due to the viscous resistance of the air and the friction between the air molecules and the pore wall, the acoustic energy is converted into heat energy and lost. 吸声性能 Sound absorption performance 超细玻璃棉对声音中高频有较好的吸声性能。影响离心玻璃棉吸声性能的主要因素是厚度、密度和空气流阻等。密度是每立方米材料的重量。空气流阻是单位厚度时材料两侧空气气压和空气流速之比。空气流阻是影响离心玻璃棉吸声性能重要的因素。流阻太小，说明材料稀疏，空气振动容易穿过，吸声性能下降；流阻太大，说明材料密实，空气振动难于传入，吸声性能亦下降。对于离心玻璃棉来讲，吸声性能存在良好流阻。 The ultra-fine glass wool has good sound absorption performance to the medium and high frequency sound. The main factors affecting the sound absorption performance of centrifugal glass wool are thickness, density and air flow resistance. Density is the weight per cubic meter of material. Air flow resistance is the ratio of air pressure and air velocity on both sides of the material at unit thickness. Air flow resistance is an important factor affecting the sound absorption performance of centrifugal glass wool. If the flow resistance is too small, it means that the material is sparse, the air vibration is easy to pass through, and the sound absorption performance is reduced; if the flow resistance is too large, it means that the material is dense, and the air vibration is difficult to be introduced, and the sound absorption performance is also reduced. For centrifugal glass wool, sound absorption performance has good flow resistance. |
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