Glass wool production base Hebei insulation glass wool wholesale price

Sales Telephone Manager 3 Wang: Centrifugal glass wool has good sound absorption performance for medium and high frequencies. The main factors affecting the sound absorption performance of centrifugal glass wool are thickness, density and air flow resistance. Density is the weight of material per cubic meter. Air flow resistance is the ratio of air pressure and air flow velocity on both sides of the material per unit thickness. Air flow resistance is the most important factor affecting the sound absorption performance of centrifugal glass wool. The flow resistance is too small, indicating that the material is sparse, air vibrations can easily pass through, and the sound absorption performance is reduced. The flow resistance is too large, indicating that the material is dense, air vibrations are difficult to transmit, and the sound absorption performance is also reduced. For centrifugal glass wool, there is flow resistance in sound absorption performance. In actual engineering, it is difficult to measure air flow resistance, but it can be roughly estimated and controlled through thickness and bulk density. , as the thickness increases, the sound absorption coefficient of medium and low frequencies increases significantly, but the high frequency does not change much (high frequency absorption is always larger). , the thickness remains unchanged, the bulk density increases, and the mid- and low-frequency sound absorption coefficient also increases. However, when the bulk density increases to a certain level, the material becomes dense, the flow resistance is greater than the flow resistance, and the sound absorption coefficient decreases instead. For centrifugal glass wool with a thickness exceeding /3 and a bulk density of /3, the sound absorption coefficient at low frequency is approximately . When the thickness continues to increase, the low-frequency sound absorption coefficient gradually increases. When the thickness is greater than the above, the low-frequency sound absorption coefficient will also be close to. Centrifugal glass wool can be made into wall panels, ceilings, space sound absorbers, etc. It can absorb a large amount of sound energy in the room, reduce reverberation time, and reduce indoor noise. Sales Phone 3 Manager Wang