A key component to PLAYERUNKNOWN'S BATTLEGROUNDS is listening to the sounds around your player.
From footsteps and gunshots, to vehicles and explosions each sound seems to have a hard set cap for distance. However, voice chat seems to be the most impactful as this will give away your location to any enemies in the area.
That being said, what is the hearing distance for in-game voice chat? Is it truly a hard capped distance or is there some sort of fading effect?