Electroglottography (EGG)
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A method for monitoring vocal fold contact area, fundamental frequency of vibration and vibration regularity (perturbation) during phonation by measuring a change in electrical impedance across two electrodes placed on either side of the thyroid cartilage at the level of vocal folds. As the vocal folds vibrate, variable resistance to the electrical current is measured and displayed. The slopes on EGG waveforms can be used to estimate open and closed phases. Typical EGG quotients are determined with algorithms applied to the EGG waveform expressing the closing, closed, opening, and open phases as ratios.[1]
- ↑ "NATS July 2022 Pedagogy Workshop Working Group Three Science-Informed Terminology and Definitions for Voice Pedagogy" (PDF). Science-Informed Voice Pedagogy Resources. Retrieved February 7 2025.
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