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I think this is true that the dolphins can to communicate each other by means of a language. I read a lot of webs site where explain different experiences about the communications’ dolphins like these. In 1962 Dr. Dreher and Dr. Evans were aboard the research vessel Sea Quest, 300 miles south of San Diego, studying gray whales. They had strung a number of vertical aluminum poles and microphones inside Scammon's Lagoon, erecting a type of barrier. A short time later five Pacific Bottle-nosed dolphins were spotted about 500 yards from the barrier. After a few minutes of what was labeled conversation, a scout was sent from the group. Microphones picked up his sonar soundings as he closely surveyed the poles. When he returned to the pod an explosion of whistles, chirps and Bronx cheer-like noises were recorded via microphones. After several minutes of conversation the dolphins proceeded through the barrier and into the bay.

A similar occurrence was noted when, in 1962, several Lockheed Aircraft Corporation scientists erected a similar barrier across a channel, this time with stronger microphones. As the dolphins approached clicking noises were heard -- possibly sonar soundings. They gathered into a group in nearby shallow water about 400 feet from the barrier. During this time lots of clicks and squeaky-door sounds were recorded. A scout left the group and examined the barrier. When the dolphin returned he was greeted in the same manner as before. After about four minutes of conversation another scout was sent out. Upon his return he too was greeted with the explosion of whistles. After about two and a half minutes the dolphins merrily clicked through the barrier. Returning into the bay that afternoon, and the next morning leaving the bay, the pod did not send a scout when they came to the barrier.....nor did they even slow down.

•Do dolphins really communicate with each other by means of a language?
Yes, they can communicate with each other by making sounds. They don’t have vocal chords, but they can control muscles in their blowholes to make different noises. Some of the noises they make sound like whistles and squeaks, and some of them are ultrasonic. They can identify themselves to each other. Scientists have started to believe that dolphins also talk with body language as well.

•How do dolphins help people like Nikki learn to speak?
Dolphins generate ultrasonic waves that induce Nikki to make endorphins that improve neuronal connections and brain functions. Therapy with dolphins helps us with the immunology system, the motor coordination, the ability to speak, etc.

•Have dolphins really been trained by the US military?
A military dolphin is a dolphin trained for military uses. The United States and Russian militaries have trained and employed oceanic dolphins for several reasons. Such military dolphins have been trained to rescue lost naval swimmers or to locate underwater mines.

• What dolphins have found a place in history?
Through the ages, people and dolphins have had a special bond. There are many well-documented stories throughout history of ancient mariners who were guided to safety by dolphins. Dolphin insignias were commonly used on ancient ships for protection. Ancient artifacts show dolphins being used in decorative ways. Prehistoric engraved images of dolphins have been found in South Africa. One shows a man swimming with dolphins. At the palace of Knossos, an Aegean civilization, the bathroom of the queen was decorated with a frieze of dolphins. This palace is dated at 1600 BC. Dolphins have been found on funeral frescoes dated from the sixth century BC. Greeks decorated their ceramics with dolphin images in the fifth century BC. Forty Greek cities had images of dolphins on their coins.