Frequently Asked Question's

Sound reduction will improve with increased glass thickness due to the greater mass involved;

Sound reduction will decrease somewhat with increasingly larger glass areas but not enough to make much difference in the majority of architectural glass sizes;

Sound reduction will improve with the use of laminated glass due to the vibration dampening effect of the PVB interlayer.

Sound reduction will improve with the use of glass/ airspace combinations, but the performance is critically dependent upon the width of the airspace. An airspace of 100mm is generally regarded as a minimum for reasonable benefits at medium to high frequencies. The optimum airspace is about 300mm.

The RW Ratings refer to the measure of sound reduction through a wall or other building element. Since the sound reduction may be different at different frequencies, test measurements are subjected to a standard procedure which yields a single number that is about equal to the average sound reduction in the middle of the human hearing range.