Choir of Voices

I don't know how much of a choir I can really call it...rather it is a myriad of loud junior high voices all tittering at the exact same time. How do they do it? Do they hear anything other than their own voice? And are they actually saying anything intelligible? I know that if I speak at the same time as others I get confused and start saying gibberish. Does logic come with age? These masses of open-mouthed kids are all exercising their vocal chords outside my office and I can't think. I can't do anything at all...anything but blog.
There is a brief reprieve...one which I will embrace wholeheartedly. Thank the good Lord for silence.