just use hide noise pollution mod or learn to mod your self

I don't know if someone has made a barrier asset that functions similar to trees, although irl trees are also the best way to dampen sounds. The leafs absorb the air, while barrier would just move the airwaves further away bringing the noise a km outward instead of directly on the buildings next to the source.

I want really functioning "barrier".

Trees are your best friend to create a noise barrier!