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Subglottal Pressure: The Lung Pressure That Drives Phonation

One of the two ingredients of the myoelastic-aerodynamic theory, taught on its own so the theory node can be a combination rather than an introduction. Establishes that phonation is powered by a pressure difference across the closed glottis, supplied by the respiratory system, and that loudness rides mainly on this quantity while pitch does not.

Questions this Concept answers

Why does raising subglottal pressure mainly increase loudness rather than pitch?

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Subglottic Pressure's Role in Vocal Loudness and Pitch for Singers

Subglottic (sub-glottal) pressure is the air pressure that builds beneath the glottis and is the primary driver of vocal loudness, with a secondary influence on pitch; it results from the interaction…