If that's so, there is nothing as far as I know, that can help, other than modifying the game files which is just blowing the situation WAY out of proportion.
Known problem. Default in-game voice system when using "Direct communication" is linked to effects volume, only vehicle/group chat are linked to radio/VON. This means it will always be difficult to hear folks near choppers and is (mostly) why the laws regarding choppers are in place. They seriously disrupt RP and are annoying as f*** when you're trying to talk to people!!