Comment Re:are the windows.. (Score 1) 474
Sorry to chime in with a me too, but double or triple glazing is the answer.
When purchasing double glazing for the street side of my home, the glazier asked if it was for noise reduction.
In my case it wasn't, but ordinary double glazing reduced the street noise a lot. (Two panes 4mm and 6mm from memory).
Where noise reduction is intended, the manufacturer adds an internal gel-coat which reduces external noise much more.