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Another technical parameter, which must be specified for the window is its acoustic insulation-class acoustic. This parameter is characterized by the ability of windows for sound coming from the outside. Insulating window is determined by the weighted index Rw administered in decibels (dB), which takes into account the specificity of reception of sounds by the human ear. In practice, we can meet up with the rate of Rw25db Rw> 40dB. It is recommended that the following relationship between the level of noise insulation and windows: * Noise level of 60dB-25dB Rw * Noise level to 61-65 dBA-Rw30 dB * Noise level to 65-70 dBA-Rw35 dB * Noise level> 70 dBA-Rw40 dB At the sound insulation windows have the following factors: * Thickness and type of glazing * Width of the inter-chamber * Type of gas used to fill the chamber inter - * Cracks in the window used to obtain ...