ABSTRACT
Process of speech production includes many voice organs [1], such as the piriform fossa [2]. To generate complex voice signals, they produce a variety of physiological activities. These physiological activities of speech production process occur mutually coordinated. One set an appropriate width of the glottis by the throat, while adjust the airflow from lungs to match the movement of the larynx [3]. When we say, organs of tongue [4], lips, and chin and so on cooperate to adjust sound track [5], and interact with throat to adjust the tone. They constitute a completely physiological model [6], a division of labor to produce speech.
