While Alpine Iodler creates an octave, monkeys come on three and a half thanks to special larynx membranes. A new study shows how these structures make Yodel -like frequency jumps possible – and why they are essential for monkeys. The great Yodel talent can be heard in the video above.
Monkeys and monkeys are the nearest family members of people, but they cannot speak. However, some species have special larynx structures with which they create frequency jumps – similar to Yodeling. An international research team compared this phenomenon with the Alpine Cultural Asset and investigated the anatomical foundations of this ability in the magazine “Philosophical transactions of the Royal Society”.
Findings apply to New World staff
With a maximum of three octaves, the frequency range is larger than in people, as the scientists rose. The findings apply to such -driven new world relay, ie the group of original primates on the American continent. These include, for example, bracket monkeys as well as hood and totenkopfchen, said chief author T. Herbst of the University of Vienna. The phenomenon is based on thin, light tissue membranes on the upper edges of the vocal cords in the larynx.
Lost talent from people
“We humans must clearly have lost these membranes during evolution,” said Herbst. In earlier studies, their exact function was largely unclear, which Jodellauts were only casually mentioned. “For the first time we were able to demonstrate the connection between anatomy and acoustic output,” the voice investigator continued.
This was achieved with the help of different methods: in “La Senda Verde”, an animal protection area in the Bolivian jungle, for example, the researchers carried out non-invasive sound recordings. These were supplemented with experiments on the throat heads of a natural monkey and with the help of computer models.
Secondon -Modi at Monkeys
The monkeys showed two different vibration patterns of the vocal folds: in the first mode only the vocal folds are active, which create tones that are similar to people. In the second mode, the larynx membranes also vibrate, which make considerably higher frequencies and abrupt, Yodel -like jumps possible. Although this frequency in people is usually limited to an octave, they extend over more than three octaves on the monkeys.
These membranes are beneficial for monkeys because they can generate more complexity in vocalization due to the more irregular vibrations that are linked to it and can therefore transfer information without using complex neural structures, the researchers suspect. People, on the other hand, would need a simple and stable sound source to convey complex information through language.
Advantages of the “Ultra-Jodder” in social life
“These results show how monkeys use a distinctive evolutionary function-the speech membranes-this makes it possible to create a larger number of calls, including this ‘ultra-iDler’,” said senior author Jacob D. Dunn of Anglia Ruskin University in a broadcast. According to Dunn, this can be especially important for primates that have a “complex social life” and have to communicate in different ways.
“We could show the vocal framework and the vocal options,” Herbst added. In which situations the “Jodellauts” are used exactly is an open question for future research projects. However, the layman requires that the sounds that are being questioned about the audio recording provided by the researchers are actually associated with Yodeslling.
Source: Krone
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