1. Humans and Other Animals

2. Hearing Ranges
Humans can hear frequencies of sounds between 20Hz to 20,000Hz.
Whales, dolphins, bats, and dogs can hear and produce higher frequency sounds than humans.

4. S.O.N.A.R.
A method used by boats to locate objects underwater. A sound is emitted and the sound bounces off of objects and returns to a computer that measures the location of the object.

5. Echolocation A way of using sound to find objects in the environment
Animals generate a sound pulse
The sound bounces off of objects creating an echo that returns to the animal.
Different objects give off different kinds of echoes.
Dolphins and bats use echolocation.