Add more atmospheric sounds to spice up the feeling of being in space.

[warcrimes]

I always find the complete silence while in a vacuum kinda jarring. Maybe some kinda  muffled breathing noise when you have internals?

Yeah, a lot of sounds do naturally transmit through the body itself, so maybe also add muffled thuds when hitting things or being hit by things, - as well as a rubbery / polyestery shuffling noise if you have a full space suit. Don't tell me a 6 layer universe-proof exosuit is perfectly quiet on the inside.