Among all kinds of color steel sandwich panels, Rockwool Porferated Sandwich Panel can be punched in two rows, three rows and all the holes on one side, and the noise can be reduced without punching on the other side. The good noise reduction performance of the perforated noise reduction panel is the first important consideration of modern architecture, To achieve the purpose of reducing the noise inside and outside the building.
There are many kinds of sound-absorbing materials for the perforated panel, such as rock wool and glass wool. By changing the variety and density of the core material and punching regularly on the color steel plate, different sound absorption effects are produced. And through the experiment, this noise reduction effect can produce no less than 29 DB noise reduction effect according to the frequency of external noise and the thickness of the core material.
There are three kinds of width: 950mm and 1050mm.
Micro hole punching treatment: micro hole diameter is 2.5mm, micro hole center distance is 5mm, and arranged at an angle of ∠ 60 °.
The following are some sound absorption parameters obtained through experiments for your reference:
| Frequency（HZ） | 100 | 125 | 160 | 200 | 250 | 315 | |
| 吸声参数 | 50mm rockwool panel | 0.34 | 0.39 | 0.6 | 0.83 | 0.78 | 0.57 |
| Sound absorption parameters | 50mm glasswool panel | 0.2 | 0.25 | 0.47 | 0.71 | 0.78 | 0.76 |
| Frequency（HZ） | 400 | 500 | 630 | 800 | 1000 | 1250 | |
| Sound absorption parameters | 50mm rockwool panel | 0.98 | 1.11 | 1.18 | 0.97 | 1.03 | 0.97 |
| 50mm glasswool panel | 1.03 | 1.02 | 1.19 | 0.98 | 0.9 | 0.86 | |
| Frequency（HZ） | 1600 | 2000 | 2500 | 3150 | 4000 | 5000 | |
| Sound absorption parameters | 50mm rockwool panel | 0.88 | 0.90. | 0.9 | 0.97 | 1.02 | 1.11 |
| 50mm glasswool panel | 0.81 | 0.88 | 0.98 | 0.99 | 1.08 | 1.08 |
