Vocal tract inertance is best described by which statement below? Vocal tract inertance is best described by which statement below? As subglottic pressure builds below the vocal folds, energy (inertia) is lost, keeping the vocal folds together As a column of air passes through the vocal folds, it gains energy (inertia) that keeps the space between the vocal folds open As a column of air passes through the vocal folds, it gains energy (inertia) that creates a vacuum (upward movement) above the level of the vocal folds