1. Material profiles aspect ly2015.2 glass ordinary glass, hollow glass, hollow glass cladding, pvb laminated glass and vacuum glass. These types of glass, soundproof glass vacuum effect is the best, because the vacuum glass is separated from the two pieces of glass, and the middle of the air is evacuated, forming a vacuum layer between two sheets of glass, the application of sound is not in a vacuum to spread the principles of sound insulation, so "bay window" No matter what kind of noise are not passed through the glass into the house. Pvb insulating glass and laminated glass is isolated or high frequency noise energy performance can also be smaller, larger for low frequency noise or energy, noise effect is not very good; soundproofing clad hollow glass in general, but security is high, not broken. 2, the process is to look at aspects of its windows look good or bad quality of the pros and cons, the accuracy of machining dimensions, the angular intensity level, as well as supporting the reasonableness of metal accessories used. 3, hardware accessories to identify their advantages and disadvantages mainly depends on its flexibility, tightness, wear resistance and corrosion resistance. The main consideration is placed in the profile fitting cavity in the lining of steel, good lining should be galvanized steel A3 # steel, wall thickness of at least 1.2 mm. Now some stalls are often produced in the lining of steel rigged in order to reduce prices to attract business, so that consumers fooled. 4, window sealing sealing means is sealing of windows, comprising a sealing glass and the border. Close and seal the border after the window frame and seal the windows and the wall after installation, which together affect the sealing performance of windows. Determined the sealing of windows are sealed, currently on the market, there are two main seal is a sealing strip wool, and the other is a rubber seal. Wool seal and rubber seal have shortcomings, wool seal long after use easy removal, greatly reducing the sealing effect. The rubber seal after wind and rain easily harden aging, but also reduces the sealing effect. 5, under the windows of the type normally, including the type of flat open windows, sliding and fixed, from sound effects good or bad, the windows of the best sound effects fixed, but this only applies to windows without opening it lighting needs another place; flat open windows and push-pull compared to the effect of noise casement sash windows users to pay better, you can choose the right type of window according to their needs. 6, while the brand windows, doors and windows in the purchase time, to ensure the appearance and quality of the case both ways, contraindications take any cheap, it is recommended to choose a product to the regular brand businesses to buy, so there is a problem late Products service more affordable. Company Website: http: //www.yjhfzs.com