If you here the footsteps of an enemy, he can already perform a melee attack. And it is often too late, to react. It would be more realistic if you could here the footsteps at least 10 meters away already, as long as there is no constant MG fire or artillery rain. Even hitting the ground after jumping should make a louder noise.
Meet in a trench and try too locate an enemy by sound.
Customer support service by UserEcho