The ability of a surface to absorb noises depends on the materials with which it is made and its thickness. The insulating capacity, in fact , is a parameter function of the mass surface, formed from the weight per square meter, which is a characteristic of each material , and varies according to its nature, shape and thickness.
Therefore in an outer wall , where the walls should be uniform and compact , the weakest elements are the windows and doors and , in particular, its glasses. The acoustic comfort inside starts here. In order to ensure a good sound insulation, the first step is the refurbishment of single glazing rather than double glazing. But of course the glass is not the only responsible for acoustic seal. For a successful acoustic insulation you must make sure that the door or window is securely attached to the wall, the component parts are dimensionally stable and ensure a perfect contact between the fixed elements and the mobile ones. Excellent insulation systems are windows or doors with thermal break. The most modern aluminum fixtures allow to control the thermal and acoustic transmission.