Typical coli smart-dumb comment.
They are not recording actual sound but computerized data of signals from the black hole interpreted as sound.
It’s called sonification.
You just dumb. Stop speaking on things you don't know and understand.
I'm a ghetto Sound Engineer. I engineer sounds for clubs and all types of events.
The earth has air molecules. Mostly gases plus Liquids (moisture), and solids makes up air molecules. Gravity keeps these molecules on earth. Sound travels by making air molecules shake and bounce into each other. Your eardrums feels the vibration and transform into the sound your brain accepts.
There's nothing in space to vibrate from. Sound bounces back to you. Ricochet right.
It can vibrate through dust clouds though
What dust from where? There's absolutely nothing within with in a trillions.
Asteroid debris is very rare. I don't think people really understand how vast of nothing space is. Stars and Planets or Zillion miles apart with nothing in between. Nothing up or down, east or west. Absolute void.