But what is mass really ? I have 2 walls near my bed that are from brick. Single brick wall but still, its mass. And it is worth sh*t, it makes me soo mad. It just isnt normal to be able to hear neighbours talking, pluging things into electric dose, opening drawers, etc. Not to mention hoses and things, its even worse. Sometimes i can even hear what kind of job ppl did at their bathroom ( whether it was pee or.... ), and i am talking about next door neighbours, not neighbours on top or below me. I just dont know how ppl building houses can be soo insensitive about this, and this part of house is 12 years old, soo its pretty new.
As for the wool, the idea wasnt to create vacuum permanently, the idea was just to suck all the air out to shrink the wool to about 1/3 of space, which i think could be done and then i would use strong duck tape to shrink it permanently ( even if the vacuum would get screwed, the duck tape would hold the wool together. Or maybe i can get some steel tiny plates to hold it together ). Therefor i could put 3x the amount of wool and it would take as much space as single layer. The idea wasnt to make it more dense to be mass instead of absorbant.
Btw this walls i was telling u about, already containing mass. Adding wool to it would be good, right ? But the problem is, i could only afford wool that is max 1 cm thick ( 0.4 inches ) or at some parts 2 cm ( 0.78 inches ), otherwise i lose too much space which i need at that part. Is it going to make any difference at all ?