I asked because it was my own curiousity (yes, different from other people I do like to learn all the time new stuff) and I started it from a foot where I said I might be wrong, I started it presuming I'm wrong, no need to reply like I'm acting smart here because I have done exactly the opposite.
As long as this really is something quite true then OF COURSE you will get a lot of people saying that the game is unrealistic for having such a rich sound background; get used to it.
Another reason I asked was because maybe this can be worked on to have freespace have more realistic "in space" sounds. I personally imagine the sounds I whould hear while being at an imaginative control board of a fighter in deep space whould be some sounds from the board electronics (like the sounds old computers used to make on arcade games) plus a very freaky silence interrupted from time to time by real space sound sources: physical collisions, engine thrust, big explosions (when you are close enough to get vibrations from the gas resulted from the explosion) and colisions with the millions parts very small debris resulted from the explosion, and gas vibrations created by storms inside nebulas. I think this type of background sound not only whould be more realistic but whould give a very spooky feeling while playing, which is how someone should feel being trapped in a very small fighter ship in a infinite sized space...
PS: Thanks for the constructive replies, very interesting