I had a quick search and couldn't see anything really related to this but here is an idea I have to add a little bit more immersion to the game.

I would like (if possible) a relatively simple filter be added to all VOIP in multiplayer games so that you can get the effect of talking over a normal radio where there is the static/grainy noise in the background, particularly more present in HF radios than it is in VHF/UHF.