supraglottal

The main air cavities present in the articulatory system are the supraglottal cavity and the subglottal cavity.

When the subglottal pressure is greater than supraglottal pressure, there is a pressure inequality in the unified cavity.

The transfer characteristic of the supraglottal vocal tract is defined with the input to the vocal tract considered to be the volume velocity at the glottis.

As analyzed by Sapir, Jabo was represented as possessing four phonemically distinct pitch levels (or registers), independent of phonation type or supraglottal articulation.

It is the first cavity of any size through which the product of the laryngeal vibrator passes; the other supraglottal cavities have to accept whatever the pharynx passes on to them.

The larynx is used to initiate the glottalic airstream mechanism by changing the volume of the supraglottal and subglottal cavities via vertical movement of the larynx (with a closed glottis).

As practiced, inverse-filtering is usually limited to non-nasalized or slightly nasalized vowels, and the recorded waveform is passed through an "inverse-filter" having a transfer characteristic that is the inverse of the transfer characteristic of the supraglottal vocal tract configuration at that moment.

The supraglottal cavity or the oronasal cavity is divided into an oral cavity (the cavity from the glottis to the lips excluding the nasal cavity) and a nasal cavity (the cavity from the velopharyngeal port which can be closed by raising the velum to the nostrils).

Since pressure is a force applied to a surface area by definition and a force is the product of mass and acceleration according to Newton's Second Law of Motion, the pressure inequality will be resolved by having part of the mass in air molecules found in the subglottal cavity move to the supraglottal cavity.