Most of the world's great religions have orders or sects whose members take vows of silence. And the Catholic Church is certainly among them, including the Trappists, Cistercians and some Benedictines. And the question begs be asked, 'How do they communicate with the secular world?'

Now, that being said, I don't know of these guys are really monks or not. But, their 'rendition' of Handel's 'Hallelujah Chorus' is one of a kind, to say the least!