If found to stand apart during the arm, then talked about a normal tone of voice. I have not heard or not understood. Show that the area is noisy even harm the hearing system.
If you find that stand apart about a range of arms and talked with the volume normally do not hear or understand. Show that the area was dangerous to step through the system.
If it is found that the feet away from each other. approximately one arm, and then discuss with the normal volume and did not hear or did not understand, that the area is dangerous to the stage sound system to hear