In this study, VLP was measured from roentgenograms of singers producing a rising pitch series. Measurements pertaining to this question will be presented in this paper. Methodical limitations often confine the study of larynx movements to VLP measurements. In this paper we focus on biomechanical factors, the exterior forces affecting the larynx, which is a relatively elastic structure, mainly consisting of cartilages, muscles and connective tissue. The singers were of high national or international level.
Arrows indicate general direction of movement.
The three top rows describe female singers, the bottom row male singers. The results of the measurements of the distances between the thyroid cartilage, the hyoid bone and the mandible are not described in detail here. Figure 2 shows the relation of the thyroid cartilage and the hyoid bone to each other. Case A is a textbook case. Various observed positions of hyoid bone and thyroid cartilage.