Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
Design feature of language
Complete Feedback is one of Charles Hockett's 16 Design features of language which states that speakers are able to hear what they are saying. Through their auditory channels they are able to receive feedback on what they are vocalizing.
References
Saxton, Matthew. "Child Language: acquisition and development". Sage Publications, 2010, p. 29.
