the loudest animal in the world is the sperm whale which
produces a sound (CLICK) to communicate with other whales. this
click is louder than a thunderclap, but since they live underwater
we don't hear their click.
Correction: The question was: What is the loudest animal on Earth?
The correct answer is: Blue Whale
How loud is a thunderclap, and what is the whale's calling Sound
Pressure Level and Power though, assuming the same distance
attenuation for both? Many echo-locating bats can call at
extraordinarily high SPLs - I believe there is one South American
species that can produce an SPL of up to 120dB re 20µPa - although
as bats are small animals the call power is very low.
It's true that you won't normally hear an underwater animal's
call, because the sound is reflected back down from the water
surface. They are recorded using hydrophones (underwater