Interesting fact:

Echolocation is used by a small subset of animals to detect objects through reflected sound waves they have emitted. The sound will bounce off an object, notifying the animal of its location, size, and path if it’s moving. These animals detect sonar through various means. For example, toothed whales absorb the sound through fatty structures in their jaws, which is then transmitted to their middle ear. Bats receive the echo directly through ear canals.