Materials used to install movable partition walls

The Sound Insulation of such walls is related to the type of core material and the thickness of the cement mortar. Their sound insulation is usually between 35 and 42 dB.
In summary, at present, there are quite a few light-weight partition walls at home and abroad with poor sound insulation performance. The sound insulation of single-walls can not meet the minimum sound insulation requirements of residential wall, and can only be used for the inner partition wall. In order to improve the sound insulation of lightweight partition walls, construction acoustics workers at home and abroad have carried out a lot of research work and accumulated certain experience . The following are some basic characteristics and laws of wallboard sound insulation: The amount of sound insulation varies with the material. The sound insulation of a single layer of uniform and dense wall panels obeys the "sound quality law" of architectural acoustics, that is, the sound insulation is proportional to the weight per unit area of the building. The surface density is doubled and the sound insulation is approximately Increase 4~5dB. When sound waves are projected on the wallboard, the heavy wall is less prone to vibration than the light wall. The low frequency is easy to excite vibration than the high frequency. Therefore, the heavy wall is better than the light wall, and the high frequency is better than the low frequency sound insulation. The surface density of lightweight partition walls is limited. To improve their sound insulation, double or multi-layer composite construction is applied.

1. The air layer is arranged with a double wall structure, and a certain air layer gap is left between the two walls. Due to the elastic layer of the air layer, the sound insulation of the total wall exceeds the mass law.
2. The application of sound absorbing materials places sound absorbing materials in the air layer of the double wall, which will further improve the sound insulation of the double wall. The greater the thickness of the sound absorbing material, the better the sound absorbing performance of the sound absorbing material, and the more significant the sound insulation. The sound-absorbing material is placed in the double-wall air layer. For the lightweight double-wall, the effect is more prominent in the double-wall. The Chinese home theater network welcomes you. It should be noted that the appearance of the acoustic bridge should avoid the rigid connection of the solid between the air layers of the double wall - the acoustic bridge. If there is a sound bridge, it will destroy the elastic layer of the air layer, so that the sound insulation is reduced. Hollow wall partition or The hollow part of the hollow block partition wall can reduce the weight of the wall, but it is not good for the sound insulation. For the hollow slab, the hollow building block and the like, and the built-in empty wall, the inner cavity cannot be mistaken. It is a layer of air that can be used for sound insulation. Because these cavities are surrounded by 100% rigid acoustic bridges, they do not have the elasticity of the air layer. Compared with solid plates, the same material has the same surface density. The amount of sound insulation will be lower than or approximately equal to the sound insulation of the latter.