Frequently encountered customer questions: "Why don't you use three or more layers of soundproof windows, so the sound insulation effect is not better", in fact, this is not the case, Guangzhou Jingmei home noise window thinks: the sound insulation performance of the soundproof window is more than A layer of glass doesn't have much to do with it, and it can be counterproductive.
As a kind of soundproofing material, the soundproofing window is the heavier the material (the density of the surface, or the greater the mass per unit area), the better the sound insulation effect. However, we neglected the soundproof window as a functional window. It is not a single glass soundproofing, but a soundproof window as a whole. The outer frame, glass and seals need to be soundproofed. The glass, or the sound-proof frame, or the sealing treatment with the wall, has good sound insulation.
In terms of the performance of the soundproof window, the more the number of glass layers of the soundproof window, does not mean that the sound insulation performance is better. Some studies have shown that some manufacturers in the market use three-layer glass two-layer cavity technology to improve the sound insulation of doors and windows. The improvement of the sound insulation of the test is not obvious. Experts of the Building Physical Environment Testing Center of Tsinghua University believe that there is enough sound insulation for the insulating glass. The mass density and the large air insulation layer, if the mass density is constant, the change of the air insulation layer will inevitably affect the sound insulation. The added third glass interferes with the air sound insulation performance of the hollow glass cavity, and the sound insulation volume is oppositely decreased. It is recommended that the soundproof window of Guangzhou Jingmeijia soundproof window should not adopt this process.
In terms of sound insulation technology, soundproof glass is only one element in the design of soundproof windows. We do not deny that soundproof glass plays a big role in noise, but we can consider that the soundproof window can be soundproofed, its surface density is very large, very heavy. For example, our soundproof windows of Jingmeijia have two-layer soundproof windows of 18kg/m2. If it is three-layer acoustic glass, there are more, so the weight can be difficult to match the outer frame, and its safety factor is quite low. In particular, the soundproof windows that are open outside, when the outer frame is deformed or cannot withstand the weight, it is easy to fall when encountering a typhoon. We have already shown that the sound insulation performance is not ideal.
From this point of view, the sound-insulating window of the multi-layer glass has no superiority in terms of craftsmanship or sound insulation effect, which is why the market has not been promoted. At present, double-layer soundproof windows are the mainstream. For ordinary traffic noise, even for train noise or aircraft noise, the sound insulation of double-layer soundproof windows is sufficient. There is no special laboratory and research institute to prove that the three-layer soundproof window is better. When choosing the soundproof window, you should be cautious and avoid the business hype.
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