Feature
* Material: aluminum alloy 6063、PVB sound control glass、Silicone sealing strip、Special guide rail.
* Sound insulation performance: sound energy lose ratio is more than 90%, combine with original windows, can reduce noise more than 40dB.
* Sound absorb: micro-holes sound absorb board filled between 2 layers of glass,it’s can absorb low frequency noise, will absorb noise together.
* Adaption scope: The house, school, hospital and so on buildings near the expressway /subway/high-speed rail.
