What Are Fuzz Balls?

There's two possible ways in which you could hear sound from a black hole. You would have to recreate it over here. Or if it actually has an accretion disk, and that accretion disk is vibrating at a certain frequency, you could recreate that frequency here on our planet, and you could hear what it actually sounds like over there. So first of all to understand whether black holes are fuzz balls or not, we have to understand what fuzz balls are. I think it was Samir Mahthar who came up with the term fuzz ball,. That's the paper about 15, 20 years ago that he published fuzz balls.