ISCA Archive MAVEBA 2005
ISCA Archive MAVEBA 2005

Vertical motion during modal and pressed phonation: magnitude and symmetry

Heather S. Shaw, Dimitar D. Deliyski

Vertical motion of the vocal folds during phonation is a possible diagnostically significant feature. However, it is difficult to judge vertical motion through the typical two-dimensional stroboscopic display. Through high-speed videoendoscopy (HSV), the dynamics of vocal fold vibration are easier to appreciate; however, the traditional HSV is also two-dimensional. Recently, a method to display a three-dimensional (3D) image of vocal fold vibration was published. This method, as well as stroboscopy and HSV, was utilized to study vertical motion magnitude and symmetry during modal and pressed phonations in normophonic speakers. Vertical motion judgments were rated as at least 16% more possible from the HSV-derived playbacks than from stroboscopy. The assessments from the 3D playback were different than those from the two-dimensional HSV playback for magnitude, however a similar trend was realized. The findings demonstrate consistently greater magnitudes of vertical motion during pressed phonations. Asymmetry of vertical motion was appreciated in both modal and pressed phonations. The results of this study concur with the concept of increased vertical motion during pressed phonation and recommend further investigations of the typicality of this important feature of vocal fold vibration in various modes and registers of normal and pathologically influenced phonation.


Cite as: Shaw, H.S., Deliyski, D.D. (2005) Vertical motion during modal and pressed phonation: magnitude and symmetry. Proc. Models and Analysis of Vocal Emissions for Biomedical Applications (MAVEBA 2005), 133-136

@inproceedings{shaw05_maveba,
  author={Heather S. Shaw and Dimitar D. Deliyski},
  title={{Vertical motion during modal and pressed phonation: magnitude and symmetry}},
  year=2005,
  booktitle={Proc. Models and Analysis of Vocal Emissions for Biomedical Applications (MAVEBA 2005)},
  pages={133--136}
}