Boards
Imagine how confusion it'd be if you woke up one day and all sounds had changed.
So every time you did something or touched something it made a different noise to what it expected to.
How much would that freak you out?
What do you reckon the weirdest, most unsettling change could be? I think a comedy sound effect every time you injured yourself. It sounds vaguely amusing but I reckon it'd be really creepy if it actually happened...