Fig. 3From: Injection laryngoplasty of human adipose-derived stem cell spheroids with hyaluronic acid-based hydrogel improves the morphological and functional characteristics of geriatric larynxMeasurement of phase difference in vocal-fold vibration. Phase difference was measured by comparing the cycles of bilateral vocal-fold vibration and defined as the ratio of the length of the phase discrepancy in one cycle (B) to the total length of one cycle (A)Back to article page