how do i construct sound barrier wall?

Answer 1

Professional sound-proof rooms usually design the walls so that sounds get trapped inside the wall but neither reflect or go through the wall. I once saw one such room that had special triangles and pyramids jutting out of the wall that helped prevent reflection of the sound.

If designing that is too complex, another thing to do is to make sure that the wall is rough so that sounds hitting the wall don't get reflected back towards the origin. In other words you need acoustically absorbtive materials such as rubber vs. metal that don't reverberate sounds when they are hit.

Answer 2

you can gte those plastic things on the bottom of boxes of fruits...its hard to explain. theyre like lumps and are really soft. like when you buy oranges, theres sometimes this fluffy thing in the bottom. if you put them against a wall it reduces sound because it can like catch them

Answer 3

you can use egg cartons