How well do whales and dolphins hear and see under water?
Whales and dolphins hear very well underwater, though not in air. A human being’s hearing ranges from 40 Hz to 20 kHz. Dolphins use very high sounds for echolocation, so they can hear sounds as high as 150 kHz. Low sounds travel very far underwater, so whales can hear up to 20 Hz. Their sight, however, is not very good, because it is not very important to them underwater. In deeper waters there is darkness, because light waves dont travel very far into water. Dolphins and whales therefore navigate by their hearing instead of their sight.
