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#24
October 14th 07, 07:22 AM
posted to rec.aviation.piloting
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Listening for Quiet
vincent norris writes:
Well, if really was "a silent sanctuary," then doubling the sound would not make much difference: two times zero decibels = zero decibels. The sound level outdoors is rarely zero. And decibels are a log scale, so a doubling of sound intensity is always an increase of 3 decibels, irrespective of the starting sound level. It is hard to even perceive an increase of 3 decibels. 
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