Silent void

Note that although you won't hear any nearby vessels in any manner, sounds caused by your own craft will certainly be still audible, such as engines, space debris hitting the craft, and so forth.

Cases of 3rd person perspective still maintaining audibility of the same things you'd hear inside the vessel can be forgiven.

Less evident cases:
* Launching anything will be audible in terms of the launching mechanism, but the rockets or whatever the thing uses for propulsion still aren't audible. Just because they were launched by you won't make them any more audible in space.
* Weapon firing and similar will sound different than in non-vacuum environment (most of the sound is generated at the barrel and is projected outwards and therefore not heard, the sound coming through the barrel into the craft itself will be severely muted and different).
* However, considering these are the ONLY things you hear with no background noise drowning sounds in like on any place with an atmosphere, the sounds should seem louder (this part may be omitted for sake of more pleasant audio experience).

Notes:
* Rarely used because this omits almost completely the use of sounds.
* This also includes any extravehicular activity in space.

Limitations:
* NOT for games completely devoid of sounds.