All the scifi animes of this sesson that I have seen have noise in outer space. Yeah, I know it's supposed to be more "exciting" this way. Tho if it was me I would skip the sound effects and put music instead.
But what are the real physics?
There should be some air particles in space. Maybe with a special receiver one could catch some noise... or not?
Maybe a directional laser could decode the sound effects?
Or is it "No sound, period."?

What about proximity explosions? Can a nearby explosion affect a close ship at all?

Recoil: when lauching missiles, shouldn't the launcher be thrown backwards, unless the missiles are sent from both sides?

errata: line 1, change sesson/season.