Someone aggressively eating an apple. Like, they chomp so loud and it never ends, they just keep eating till it's all gone. @Strop: I think you meant to post in the "Best noise you can hear". ;3
I would rather be rickrolled in the middle of the night than hear the friday song it drives me crazy PS if you send me a post with that song im coming after you.
I would say tinnitus. It's like an ultrasonic whine that doesn't exist anywhere except in the sufferer's inner ear. It's there all the time, and drives you mad over the course of months, even years.
I have tinnitus and it is the worst thing ever. You know how after an extremely loud noise you ears ring and you get that high pitch sound. It's like that but ALL the time. It does indeed drive you insane.
The noise that sounds like "pshsuioah!" in the middle of the night. Once I was sleeping and all these boxes fell in my room and I thought it was an earthquake and I started shaking