Doors and windows are an important part of home decoration. Whether the sound insulation performance of doors and windows is good directly affects the quality of family life. Although adopting aluminum alloy soundproof window method is a passive method to solve traffic noise, the effect is obvious. Practice has proved that aluminum alloy soundproof window installed in areas with serious road noise, indoor noise can be reduced to less than 30dB. There are three types of soundproof glass, and the following is an introduction to fuxuan doors and windows.
1. Hollow glass
hollow glass is not vacuum glass. The concepts of the two are different. Hollow glass uses two (or three) pieces of glass and uses high-strength and high-air-tightness composite binder to bond glass Cover with aluminum alloy frame containing desiccant, made of high-efficiency sound insulation glass. Hollow glass is not a professional sound insulation glass. Although it is effective for voice, it has no effect on other medium and low frequency noise such as traffic noise. Insulating Glass has poor sound insulation performance, so the effect of using insulating glass as soundproof window is very limited.
2. Vacuum glass sound insulation performance and disadvantages:
vacuum glass is to close the two pieces of flat glass, draw the gap into a vacuum and seal the vent hole. The gap between the two pieces of glass is 01-02mm. Generally, at least one of the two pieces of vacuum glass is low-radiation glass, in this way, the heat dissipated through the conduction, convection and radiation of vacuum glass is minimized.
In principle, the sound insulation performance of vacuum glass for aluminum alloy doors and windows is good, but vacuum glass, as sound insulation glass, has its fatal disadvantages. First, although vacuum can prevent sound transmission, according to the inspection of architectural Physics Laboratory of Tsinghua University, in order to ensure the vacuum layer, vacuum glass adds solid support tray invisible to the naked eye to form solid sound transmission, the sound insulation effect has not been significantly improved; Secondly, vacuum glass can be desorbed from the glass surface or surface due to gas leakage and penetration, and gas gathered on the glass surface under the action of temperature and sunlight, or diffuse into the vacuum layer, thus affecting the service life of vacuum glass.
3. Laminated glass sound insulation performance and advantages:
(1) the sound insulation capacity of laminated glass is subject to the law of quality, that is, the surface density (product of material density and thickness) determines the overall sound insulation capacity; Those who know laminated of glass know, laminated glass is generally composed of two layers of glass and film, with small thickness and high glass density. Therefore, laminated glass has high surface density, and its sound insulation performance is the most ideal.
(2) laminated glass has the consistency effect of sound insulation performance. The purpose of noise reduction and vibration control is to find that the acoustic frequency of the coincidence effect is not in the range of the frequency band that requires noise reduction; The coincidence effect of laminated glass occurs at about 3000Hz, which is far away from the medium and low frequency traffic noise, it is currently the most ideal soundproof glass used in busy traffic trunk roads.
