Vocal fold contact area
Ingo R. Titze, David G. Druker, Paul L. Durham · The Journal of the Acoustical Society of America · 1987
Vocal fold contact area is generally inferred from the electroglottographic (EGG) signal. To our knowledge, only one attempt has been reported to measure contact area directly [Scherer, Druker, and Titze, Vocal Fold Physiology Conference, Tokyo, Japan (1987)]. This direct measurement is needed to identify artifacts and ambiguities in the EGG signal that may lead to questionable interpretations of vocal fold movement. In particular, the spatial distributions of contact area (anterior-posterior and vertical) is not always clear by simple inspection of the EGG signal. In this study, excised dog larynges were prepared and mounted such that one vocal fold could vibrate against a sheet of electroconductive glass. The area of contact was then extracted by videostroboscopy and image processing techniques. Comparisons are made between three-parameter and four-parameter simulation models of EGG and the experimentally determined contact area. [Work supported by NINCDS.]