Factopus

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LESSON 2 · Life in the Deep

PAUSE TO THINK

What animal makes the loudest sound on Earth?

The sperm whale

Sperm whale clicks can reach about 230 dB re 1 uPa underwater, often listed as the loudest biological sound. Underwater decibels are not directly comparable to air decibels, but the pulses are still powerful echolocation signals.

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