The sound of footsteps in the game is too quiet, it causes the movement of the enemy that can not be heard at a distance of 5 meters, and if the enemy sneaks it is not audible at all.
This study scouts and snipers:

1. Steps - 30 meters.
2. The sound of a broken stick under the foot - 70 meters.
3. Climb of -16 meters.
4. Talk - 90 meters.
5. Cough - 40 meters.

In Arma2 it did not cause problems, as it was closer to reality. I beg to add Arma3 more realistic distances for these sounds. It is of great importance in the course of hostilities.
Here is the video: http://youtu.be/v24pQOm6CWQ