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Electroglottography (EGG) / Electrolaryngography (ELG)

Electroglottography (EGG) and electrolaryngography (ELG) are techniques for monitoring and quantifying aspects of vocal fold vibration. This entry examines the uses for EGG and ELG, how they function, and interpreting the output waveform.

Monitoring the Vibration of Vocal Folds

The vocal folds within the larynx vibrate during voiced (pitched) speech and singing, and their vibration frequency can be altered resulting in pitch variation during speech and different notes when singing. Monitoring vocal fold vibrational activity is not easy, because they are within the neck. EGG and ELG are measurement techniques that enable the vibration of vocal folds to be monitored noninvasively in vivo without disturbing the speech or singing of the subject. Aspects that can be explored using these techniques include fundamental frequency of vocal fold ...

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