题型:阅读理解 题类: 难易度:困难
浙江省浙南名校联盟2023-2024学年高一下学期寒假返校联考英语试题
Why do we talk the way we do? It might date back to when our ancestors left the jungle for the open plain. Between 5. 3 million and 16 million years ago, Africa's landscapes changed from thick, leafy forests to wide-open grasslands. This environmental change pushed our ancestors out of the trees and onto the ground. Along with all of the physical and behavioral changes this may have caused, researchers also believe it may have changed the way we speak.
"Open landscapes provide us with fewer objects to affect signal communication, meaning our voices can travel further compared with that in thick forests, " Charlotte Gannon, a researcher who studies language development, told Newsweek. "The move to these open spaces may have increased the effectiveness of our communication. "
By comparing the vocal calls of the orangutan (大猩猩) , Gannon and her team were able to establish how different calls could travel across different landscapes. In their study, the team played 487 calls from orangutans and measured their audibility (可听度) at set length over an overall distance of over 1, 300 feet in the South African plain.
"Our results were surprising, " Gannon said, "The rule of sound spread suggests that lower-frequency ( 低频率) sounds (the grumphs) would have traveled further than higher-frequency sounds (the kiss squeaks). Our results actually found the opposite to this. " In these environmental settings, consonant (辅音)-like calls traveled a lot further than vowel ( 元 音 ) -like calls. Actually, around 80 percent of consonant-based calls were audible at 1, 300 feet, compared to only 20 percent of vowel-based calls.
Gannon said these results highlight the importance of studying living orangutan to learn about our species' history. "We can view them as time machines that allow us to recreate key moments of our history so we can learn more about the development of our language, " Gannon said. "Despite their popularity in modern languages, consonants have often been forgotten when discussing speech development. Our research highlights not only their presence in ancient times but their importance to the development of language. "
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