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airstream process

 

Intelligible sounds are produced by firstly placing the organs of the vocal tract in a specific configuration which influences the flow of air as it passes through the oral and/or nasal cavity.

 

Phonation process

An airstream formed in the lungs passes into the trachea and finally into the larynx, which is situated on top of the trachea. The larynx is the principal structure for producing vibrations of the air stream, while the oscillating vocal folds are responsible for activating vibrations of the air. The rapid closing and opening of the vibrating vocal folds periodically interrupts the air stream and produces a glottal tone later modified in the cavities of the vocal tract.

Oronasal

In normal breathing, the air stream will usually pass through the nasal cavity.

in many speech sounds, the nasal cavity is blocked off  in the back of the throat and theair stream is directed into the oral cavity. 

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