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Noise reducing IGU

Modern windows, along with energy efficiency and light transmission functions can and should provide sound insulation. In accommodation, the level of background noise should not exceed 40-45 dB. Background noise of the street is 60-80 dB, and a passing motorcycle or the malfunctioned car can make background noise jump up to 90 dB. The human ear difference of background noise of 10 dB takes as twice as less sound, so after replacing old windows with new double-glazed window with a standard (4-16Ar-4, Noise insulation Rw 30 dB), the human ear will be felt tenfold reduction in noise, but it is not enough for apartments with windows overlooking the busy street.

Components of the glass have their resonance frequencies, so use in insulating glass panes of glass of different thickness as well as the spacer of different widths significantly improve the sound insulation properties of glass unit.

The simplest and therefore the cheapest way to improve the sound insulation of glass unit - replacing one standard (4 mm) pane of glass with a thick (6-10 mm) one. Increasing the thickness of a single sheet in a standard double pane windows, noise-proof Rw value can be increased up to 38 dB (4-16Ar-10). The main disadvantage of the glass unit – it’s weight gain in half compared with standard glazing. In triple-pane windows over single-chamber the proofing performance is only slightly better. A significant improvement in sound insulation performance is achieved with the use of spacers of different widths and glass plates of different thickness.

The resonant frequency of the standard insulating glass panes is 200-250 Hz, which corresponds to the range of the most intense background noise of the street. This problem is solved by mounting the dispersion coating in the windows, which does not reflect the sound waves, while scatters them. E.g. a 7 millimeter single triplex has a value of about 33 dB Rw, which indicates the possibility for the simultaneous solution of increasing security and insulation problems.