can you imagine a vacuum

[silvertone]

yyes

[bluaki]

wouldn't that be both

assuming that "the speed of sound" is a valid concept in the area around a black hole, yes, but you can exceed the speed of sound with much less than a black hole

[don't let's]

If a blackhole was in air and the sound could somehow escape the event horizon i wonder what it'd sound like

boyah

[ME##]

boyah

I hear Nyerp

[Daddy]

I just realized this would require a sonic boom