Sound Absorption Performance Of Rubber And Plastic Insulation Board

Rubber and plastic insulation board has good sound absorption performance. In actual use, there are many factors that affect the sound of rubber and plastic insulation board, such as thickness, density, air flow resistance, etc. Their influence is great. The air flow resistance is usually the ratio of the air pressure on both sides of the material per unit thickness to the flow velocity between the air on both sides. It will also affect the sound absorption efficiency of rubber and plastic insulation board. If the flow resistance is too small, it means that the whole material is very sparse. In the process of air vibration, it is particularly easy to pass through such materials, and their performance will be reduced.

In fact, with the gradual increase of thickness, the sound absorption coefficients of some low-frequency and intermediate frequency will gradually increase, but their high-frequency sound absorption coefficients do not change much, and the thickness remains the same. In this case, when the weight of the whole rubber and plastic insulation board increases, their low-frequency and medium-frequency sound absorption coefficients will gradually increase, but when the weight increases to a certain level, the material will become special. Their flow resistance will gradually be greater than the good flow resistance, and even the whole sound absorption efficiency will gradually decrease.

It can be seen that in the process of actual action, the absorption coefficient or absorption performance of different sounds is directly related to them, and there is also a direct relationship with the content. Direct relationship. If their bulk density is high, the sound absorption performance will be reduced, because the material becomes particularly compact, which will have a great impact on them.