Laryngeal vibrations: A comparison between high-speed filming and glottographic techniques

Abstract

Information on laryngeal vibrations obtained by high-speed filming, photoglottography (PGG), and electroglottography (EGG) were compared [in humans]. Simultaneous glottographic signals and high-speed films were obtained from 2 subjects producing steady phonation. Measurements of glottal width were made at 3 points along the glottis in the anterior-posterior dimension and aligned with the other records. PGG and film measurements give essentially the same information for peak glottal opening and glottal closure. The EGG signal appears to reliably indicate vocal-fold contact. Together, PGG and EGG may provide much of the information obtained from high-speed filming as well as potentially detect horizontal phase differences during opening and closing.