Wow, look at this demo of how effective this
noise control barrier is! I used a translator and the English text says -
"Sponge-like soundproof material with irregularities is common. Waveber Quad zero is a soundproof material whose surface is reinforced with Al. The thickness is amazing 1.2 mm."And
here's another of a similar material.
Now if we could only source this product here in N America!
EDIT: I think these may be the same
Wavebar and Quad Zero products manufactured in Australia.
Very impressive results!
