0 dB is clipping limit, normally the level was on -30dB but THAT was at like "breathing" level, thats why i lowered the thresold to -15dB. of course if you YELL at the other side of the room, the sound that actually reach the mic may not be enough to reach -15dB, but if you breath or whisper with your mouth in the mic you are obviously producing sound above -15dB. I tested the sensitivity of the mechanic by putting my mic like 1 or 2 feet away of me and talking loud, not screaming. Of course at the end it will all depend on the sensitivity of each player's mic and the settings you have it configured in your computer.