Dolphins can emit echolocation signals to investigate the situation and detection of obstacles, and the so-called “whistle”. These signals they tell each other about your condition. For example, “I’m in trouble” is a great melodic whistle, following a short and dull. “I’m angry” – it sounds like barking. There are sounds that indicate a greeting, farewell or disturbing. Those signals dolphins recognize members of his clan. Proven fact was that each Dolphin has its own name, which receives immediately after birth and responds to it all his life.
The most talkative representative of the Dolphin is the Beluga, or white whale. They povizgivayut, whistling at high frequencies, produces a melodic shimmering trills and sounds like a cackle, chirp or mauganui. Belugas can even imitate bell ringing or voices of birds, which have never been seen. These competencies often referred to as “sea Canaries”.
Human speech for the dolphins too slow and wordy. The exchange of signals they have launched much faster and always “on the case”. Dolphins can emit sounds that are inaudible to the human ear, for example, the same sonar signals. Dolphins can distinguish sounds in the range from 100 Hz to 300 kHz (for the people “ceiling” – 20 kHz, although some musicians are able to distinguish sounds up to 40 kilohertz).
Since ancient times, people did not lose hope to establish with the dolphins bilateral contact. This would help to determine the level of their intellectual development and to understand who is smarter dolphins or people. And while humans and dolphins communicating mostly in sign language and with the help of short signals understood both.