Even though their communication is most often characterized by the use of sounds, they are also known to resort to body language to communicate with each other and also, with humans.
Dolphin Facts: Communication
Even though they don't have vocal cords like us, the nasal air sacs located below their blowhole can help them create a wide range of sounds.
How do They Communicate With Each Other?
The wide range of sounds that dolphins make are broadly categorized into three groups: frequency-modulated whistles, clicks, and burst-pulse sounds. Frequency-modulated whistles work as signatures for these mammals. Each of the dolphins have a unique whistle, which helps them identify each other.
The young ones are trained to identify their mothers whistle at birth itself. Clicks predominantly facilitate echolocation―in which the location of a particular object is determined on the basis of the time taken for the echo. When foraging, the frequency of clicks increases as the dolphins close in on the target.
Though scientists have collected a significant amount of information on communication in these mammals, they still believe that there is a lot more to learn about them. In fact, there are studies which reveal that dolphins have the ability of mimicking various sounds, including that of a motor boat and human laughter.
While the mystery surrounding their social behavior has been decoded, communication is one aspect wherein we still need to work on.