The noise reducing capabilities of acoustic glass depend on the thickness of both the interlayer and the glass panes themselves. Modern PVB interlayer technology is better than traditional resin at insulating against sound transfer, and the thicker the glass, the more it can dampen sound vibration. However, it’s important to note that soundproofing glass is only as effective as its frame. If there are unsealed gaps around windows or doors, or the building envelope is too thin, then sound can find a way through anyway. When installed correctly, laminated acoustic glass can be extremely effective. Acoustic glass is given an ‘Rw’ value according to the Weighted Sound Reduction Index, which rates its noise insulation effectiveness in decibels. The higher the Rw value, the better. When it’s at least 12mm thick, soundproof glass can reduce noise up to 50dB. At EGW, we use Pilkington Optiphon glass (formerly known as Pilkington Optilam Phon), which has an average Rw value of 45dB.