How do bats use sound to help them see?

Bats use sound to help see in the dark (don't forget bats are blind) by using something called echolocation. echolocation is were the bats make noises and the noise waves bounce back giving the bat an idea of its surrounding.

However when the bat finds prey its sound changes. The sound the bat makes when getting pray is a clicking sound which gets faster and faster as it gets closer.

• Echolocation is like that of a submarine's radar.
• Another animal which uses this exact same method is the dolphin.