Electroglottograph

The Electroglottograph Is A Device That Enables Monitoring Of Variations Of Vocal Fold Contact By Measuring Motion Induced Variations In Impedance Of Neck Tissue In The Area Of The Vocal Folds. Electroglottography Represents One Of The Few Non-invasive Methods Available For Obtaining Useful Information About The Vibratory Patterns Of The Vocal Folds. A Small, High-Frequency Current Is Passed Between Two Electrodes That Are Secured Around The Neck At The Level Of The Larynx. The Opening And Closing Of The Vocal Folds Causes Variation In The Electrical Resistance Of The Current. These Changes In Resistance Are Then Displayed On Screen.