Marine mammals must channel these clicks to accurately locate object. This channelling is aided by fat deposits located in the brain case of toothed whales. In sperm whales, these can weigh many tons. This fat deposit in other toothed whales, called the melon, is smaller. Another large fat deposit, located in the lower jaw, is strategically placed behind an area of the jaw where the bone is very thin. This deposit is similar in composition and extends up to the middle ear region.
When the animal creates the "clicking" echolocation sounds, they are focused in a directional beam by the melon. The echos that are reflected from food sources are received at the "acoustic window" area in the lower jaw. From there, the acoustic information is transmitted to the middle ear, and ultimately to the brain for interpretation.
And then, it's time to eat!