Just now, some of my neighbors were carrying some big boxes out, and dropped them. It made a long crash which sounded like doomsday, so of course I jumped out there to see if anybody was hurt or anything.
Now, apart from some picking-up being needed, no harm had been done. But it got me thinking: every stairwell I've been in, in my whole life, has had this noise-exaggerating effect to it. Simple because it's built like a box, and with hard walls, and nothing has ever been done to dampen noise, not even a few tapestries or whatever. Why? Because it's cheaper of course.
And so, just to save a few thousand whatever, for the hundred years the building stands, everybody who ever lives there has to live with exaggerated noise in their home.
It's the same problem, just to a lesser degree, in noise insulation between apartments. I would love to live in an apartment building which was built well in this regard, but I don't even know if they exist.
And this is not the exeption, it's the rule. I think it says a lot about humanity.