Sound insulation



Noise is an ever-growing concern in today’s world. High traffic streets and noisy factories are issues that people must face ever more often. Using insulated glazing for sound damping can be an effective solution. Depending on their purpose, insulated glass units have different product properties for achieving the desired sound insulation performance. The acoustic attenuation capacity of an IGU depends on different factors.


Parameters affecting the sound insulation of insulated glass:


    Glass thickness [ the higher, the greater ]


    Glazing configuration [ asymmetric ]


    Space between panes [ the wider, the greater ]


    Type of gas [ argon ]


    Special glazing [ laminated, tempered ]



The acoustic attenuation of glass is expressed by R (dB) – indicating how many dB of noise the glass can damp. Rw– index is used for noise in the middle frequency spectrum (human voices, higher frequency roadway noise).


Structure of insulated glass unit.


Sound reduction index (Rw)



4 / 16 / 4


6 / 16 / 6


6 / 16 / 4










The table presents IGUs of different structure. The higher the sound reduction index, the more efficiently an IGU can damp sound. As seen, IGUs with panes of different thicknesses are better sound insulators than IGUs with panes of the same thickness.