Dolphins and whales have voices, but it’s a lot different from most other mammals. The limited visibility under water made sounds and hearing very important for them. The sounds of the whales are not produced with their mouth/beak but only inside their blow-hole. They also use frequencies that reach far beyond our hearing capabilities. Of course they can also hear these higher frequencies. Just as we, whales use sound to communicate. Large whales can communicate over very large distances (several hundred kilometers!) using very low frequencies. Read the rest of this entry »