Sound barrier and double glass which sound insulation is good
whether it is Made of steel plate or made of glass is to let the sound of a way to be isolated, so that the sound up to go, are possible, you can consider the next budget and beautiful
if you are responsible for sound insulation construction, set up noise barriers on the road, and if you mean the road on both sides of the barrier is not a material difference,
If you are a household, do noise on both sides of the road with noise windows
