The Evolution of Spoken Language

The emergence of language makes information communication and transmission more convenient. The theory of descending larynx suggests that anatomically, modern Homo sapiens have a longer vocal tract due to the lower position of their larynx compared to their ancestors and non-human primates, allowing them to produce a variety of sounds, especially subtle vowel differences, gradually leading to simple oral communication. At first, language was short and sharp sounds, but later evolved into more complex languages with the development of the tongue, mouth, and other parts.

The unit is designed for unsupervised public use: controls are recessed or shielded, moving parts are enclosed, and the interface is operable by a child of about six with no instruction. Where a screen is used, the language can be switched without changing the hardware, and the content can be replaced on site.

There are over 7000 languages on Earth, but the mechanism of language production has always been an unresolved issue. For a long time, the scientific community has proposed many hypotheses. In the 1960s, researchers first proposed a theory about the evolution of the throat, believing that it was the evolution of throat structure that gave modern humans the physiological basis to start speaking. Compared to other primates, humans have a lower throat position, and the decline in throat position allows modern humans to have an elongated vocal tract and produce various vowels with distinct meanings. Researchers believe that human functional language originated from the diversity of vowels, which was the cornerstone of early language.