A Jecklin disc is meant to give separation between channels, like your head does between your ears. Using one to mute talkers will also mute that part of the sound that is occupied by the talkers. I do not stealth, but stands can be raised to get above the talkers, with the exception of omni mics, although would help to an extent. There is very little you can do about people in front of you, but the only problems I have from behind are things like bottles breaking in a bin, for example, with cards and I rarely run over 7' - 8'.