Sunday, 25 September 2016

Dolphins recorded having a conversation 'just like two people' for first time



 Sarah Knapton, science editor 
11 SEPTEMBER 2016 • 1:08PM

Two dolphins have been recorded having a conversation for the first time after scientists developed an underwater microphone which could distinguish the animals' different "voices".
Researchers have known for decades that the mammals had an advanced form of communication, using distinctive clicks and whistles to show they are excited, happy, stressed or separated  from the group.

But scientists have now shown that dolphins alter the volume and frequency of pulsed clicks to form individual "words" which they string together into sentences in much the same way that humans speak.

Researchers at the Karadag Nature Reserve, in Feodosia, Russia, recorded two Black Sea bottlenose dolphins, called Yasha and Yana, talking to each other in a pool. They found that each dolphin would listen to a sentence of pulses without interruption, before replying.

Lead researcher Dr Vyacheslav Ryabov, said: “Essentially, this exchange resembles a conversation between two people.

“Each pulse that is produced by dolphins is different from another by its appearance in the time domain and by the set of spectral components in the frequency domain.
“In this regard, we can assume that each pulse represents a phoneme or a word of the dolphin's spoken language.

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