How is it people still don't know this?

The sound of dragging chair, marble dropping, door slamming, running footsteps, all those aren't what you think they are.

It's the sound of various parts of the building contracting and water pipes.

But talk to a superstitious and they'll say it's 👻

Move out I guess. These things are normal when it comes to highrise.

Unless you want to sound-proof your enter house, ceiling, walls, floors etc.