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| Research found that bat cubs also "babble" |
On August 19, "Science" magazine published a research result-the voice of bat cubs has the main characteristics of human babbling
.
Studies have pointed out that bat cubs, like humans, "babble" begins in the early stages of development, and has obvious repetitiveness and rhythm
When Ahana Fernandez, an animal behavior researcher at the Natural History Museum in Berlin, and her colleagues trek through the rainforests of Central America, they continued to hear an unusual sound: sharp, repetitive chirps and squeaks
.
They discovered that these sounds came from the cubs of the big silver bat.
Mirjam Knörnschild, a behavioral ecologist and co-author of the paper, said: “Although this behavior appears to be very similar to the babbling of human babies, scientists have not formally compared the two behaviors
.
” Therefore, scientists sought advice from experts who study infant language development.
Immediately, the researchers recorded 20 bat cubs from eight different communities in the rainforests of Costa Rica and Panama for several weeks, and obtained syllable data of 55,000 bat cubs
.
Because the human ear cannot fully adapt to the sound of bats, and some frequencies are beyond the range of human hearing, researchers can only rely on computers to visualize the sound
After analyzing these syllables, the researchers found that bat language and human infant language have common characteristics: constant repetition, lack of semantics, a certain rhythm, and so on
.
In fact, adult male bats will make complex "singing sounds", just like the sounds made by songbirds to defend their territory and attract mates
.
These sounds are composed of 25 different unique "syllables"
Since it is the first time to do such research, the 55,000 syllables in the recording must be manually classified
.
In the future, the researchers intend to use machine learning to continue to analyze this database
According to Sonja Vernes, a bat researcher at the University of St.
Andrews, this work has opened up new options for the study of vocal learning in mammals
.
She pointed out that bats may become an ideal animal model for studying mammalian vocal learning and development
Related paper information: http://doi.
http://doi.
org/10.
1126/science.
abf9279
