In my bedroom i have a new Double Glazed window with one big pane and a quarter light and a bigger opener under that. I hate noise and i can hear the hum of the motorway / roads in the distance. Is there anything i can do to stop that noise? I have heard of secondary glazing but we only just changed these windows! (2 weeks ago) Toughened glass in windows. No slack in openings as far as i can see.