Sound insulation glass is divided into insulating glass, laminated glass, and multi-layer composite laminated glass. The sound insulation effect of insulating glass is 8--15 decibels, and the market price is about 80-120 yuan / square meter. This kind of glass is generally used as sound insulation glass on the market at present. It belongs to the second generation glass. The first generation glass is a single piece of glass, and the third generation glass is a glass with a sound insulation effect of more than 25 decibels.
The sound insulation effect is 15--21 decibels, and the market price is about 130-200 yuan / square meter. In order to save money, many consumers think that adding a layer of insulating glass windows behind the original insulating glass windows can reduce the sound to a very low level. Of course, they think that after doing so, the indoor environment will be quiet. This kind of misunderstanding, the actual measurement result: the noise is only reduced by about 5 decibels on the basis of the original first floor window! Why does this result happen? This is determined by the physical characteristics of insulating glass. The sound insulation limit of insulating glass is between 8 and 15 decibels. If it exceeds its sound insulation limit, it is very difficult to descend further. The reason why there is still very little noise reduction by installing a layer of windows that are exactly the same as before!
The sound insulation effect is 25--45 decibels, and the market price is about 150-500 yuan/square meter. If the interlayer film in the laminated glass is a very soft and elastic sound insulation damping glue, it can increase the damping coefficient of the laminated glass, thereby improving the sound insulation of the laminated glass. The sound insulation can reach 25--38 decibels or even higher.
The sound insulation effect is 25--45 decibels, and the market price is about 350-800 yuan/square meter. The multi-layer composite laminated glass is a combination of hollow and laminated glass. The comparison test conducted by the University Building Environment Testing Center shows that the multi-layer composite laminated glass is a composite structure with the best sound insulation performance. It can reach the quiet level close to the basement. This glass also has the functions of thermal insulation, energy saving, anti-theft and explosion-proof, etc. This kind of sound insulation and noise reduction glass, which is economical, applicable and easy to expand production, is being vigorously promoted and applied nationwide. Installing soundproof windows [soundproof glass] has become a necessary choice to alleviate the troubles caused by urban noise.