How does it     work?
3: How Does it Work?  

Why do bats make the biosonar sounds that they do? Why do they chirp instead of clicking like dolphins? Find out some answers in this section.


How do animals use their biosonar signals to build pictures of their surroundings? One answer is that they measure the period between the time they emit a sonar pulse and the time they hear an echo of that pulse. This gives them an accurate idea of the distances (range) to reflecting surfaces in their environment. Find out more about range in this section.