How to Reduce Road Noise through my Windows? These acoustic glazed horizontal siders were fitted in a bedroom overlooking a busy main road. The acoustic glass and sealed aluminium frames made a noticeable difference in the noise coming in from the road. The house is modern, and the existing double glazing is modern, however the addition of acoustic secondary glazing is more effective than upgraded PVC windows for noise reduction and heat retention. Add to your window’s efficiency by installing Secondary Glazing for a warmer, quieter and safer home.