"Blue whales have very deep voices and can vocalize at a volume of greater than 180 decibels, the loudest sound of any animal." Some of the sounds that they make are grunts, hums, moans, or clicks. Their voices can go so low that the human ear cannot hear them and their sounds can travel for several miles through the ocean. The whales use these noises to communicate when hunting for krill and when searching for a mate.
The slap of a whales tale is another commonly heard sound coming from these great creatures.
