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Possible Duplicate:
What is the origin of “shh”?

We've all been told to be quiet with a stern "shh!" But where does it come from? And when did it enter popular usage? Is is universal or specific to English?

Coincidentally, it sounds like white noise from a radio or television. Did it possibly originate around the introduction of either?

marked as duplicate by coleopterist, user19148, tchrist, Cameron, JSBձոգչ Nov 19 '12 at 4:32

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