WHAT DOES ENHANCED SOUND INSULATION SASH WINDOWS MEAN?

I'll share along with you a supplemental figure I'm mindful of which is a reduction of ten dB, but be sure to, will not consider this as Solid in stone due to the wildly varying conditions of sash windows, and also to me the determine is sort of worthless due to this and if noise air pollution is of actual worry to you, then make sure you disregard