How Whales Hear
Sound travels four times faster through water than it does through air, because water is a denser medium. This also means that light will not travel as well. So, whales, dolphins and porpoises (cetaceans) rely a great deal on their hearing to communicate, find food and make sense of their surroundings. Toothed whales echolocate, baleen whales do not. All cetaceans make sounds to communicate. This simple activity will give you a sense of what it is like to receive sound in a way similar to these marine mammals.