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Using whale songs to image beneath the ocean

Using whale songs to image beneath the ocean’s floor: Seismic data generated by whale songs helps build a picture of the ocean's base.

"The song of a fin whale is not exactly the sort of thing you'd typically describe as musical. It's generally in the area of 20Hz, which sounds more like a series of clicks than a continual sound, and the whales produce it in second-long bursts separated by dozens of seconds. But they are loud. A guidance on hearing risks places danger at any level above 80 decibels and the loudest concerts as hitting roughly 120 decibels. A fin whale's song can be in the neighborhood of 190 decibels, and it typically goes on for hours."

Source: arstechnica.com

whale songs beneath fin song ocean typically image