around by the way that sound wave bounces off objects and returns to them. A sperm whale's click is 200 decibels, the unit used to measure the intensity of a sound, said Jennifer Miksis-Olds, associate professor of acoustics at Penn State. To give you a sense of the scale, the loudest sound NASA has ever recorded was the first stage of the Saturn V rocket, which clocked in at 204 decibels.
But the whale is not really..."
http://fivethirtyeight.com/features/the-loudest-sound-in-the-world-would-kill-you-on-the-spot/
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