The process of talking involves several body system specifically the central regulator of talk in the brain, involving the respiratory system, the structure of articulation, resonance of the mouth and nasal cavity. To refine the process of this conversation. The first thing happens is encoding under our head the process of talking involves two main stages of mental activity they are: 
Ø Forming ideas to be expressed and choose words that will be used
Ø Regulate motor vocalization and the real work of the vocalization itself. Formation of ideas and even choice of words is a function of the sensory association areas of the brain. Next,
1) Then when you open the mouth air pressure from the lungs creates a steady flow of air through the trachea larynx and pharynx (back of the throat). Water pressure from the lungs creates a steady flow of water through the trachea larynx and pharynx (back of the throat).
2) The vocal folds in the larynx vibrate, creating fluctuations in air pressure that are known as sound waves . The vocal folds in the larynx vibrate, creating fluctuations in water pressure That are known as sound waves .
3) Resonances in the vocal tract modify these waves according to the positio
n and shape of the lips, jaw, tongue, soft palate , and other speech organs, creating formant regions and ( voiced ) sound.
4) The moveable organs of speech then move in certain ways either independently of each other or each or in combination with each other or with the fixed articulators
5) our muscles of speech can contract, and the contraction produce changes in the shape of the vocal tract. These change cause corresponding modifications in the acoustic quality of the all air streams coming upwards from the lungs.
6) This modified air-stream comes out to the outer air either through the mouth or trough the nostrils ar patterns of sounds.
7) These sound waves pass trough the air (or other media which you speak) and the result is speech that listener can hear.
Everything we can hear is processed by brain then conveyed through for the nerves system. Our brain work together with other organs of our bodies so that our bodies can work as ordered in the another word is, the first thing happens is encoding. Which are also influenced by the psychcological and linguistic level.
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