Is it true that things don’t make sound if you can’t hear them?

Dinosaursandanime65
Like, if Hiroshima happens again in Italy, but I’m in Madagascar then did it make a sound? That’s what one of my favorite YouTubers said while explaining how Gardevoir is able to make black holes. But even if that is true, then does that stay the same is someone else hears it? This is like saying something doesn’t exist if you can’t see it.

Guy: Hey, a new dinosaur was discovered, this time it had skin imprints

Dude: Well I’ve never seen a dinosaur so they aren’t real
Is it true that things don’t make sound if you can’t hear them?
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