With its increasing number of professions relying on voice, modern society places ever greater demands on our speech organs. As a result, dysphonia
is on the rise in a wide variety of professions.The voice is the acoustic product of the larynx function and the structure of the phonation organs. In addition to morphological evaluation, the functional examination of the larynx is therefore of special diagnostic importance. Effective diagnostics is thus an essential prerequisite for selective, individual therapy to restore or improve speech quality and performance. According to the recommendations of the European Laryngological Society as well, research and evaluation of the speech organs form an essential part of voice diagnostics. Endo-stroboscopy has also been established for some time as a routine clinical procedure. The stroboscopic principle is based on a visual illusion and facilitates detailed and nuanced evaluation of vocal cord oscillations. The essential diagnostic significance
lies especially in the differentiation of organic dysphonias.

However, this process is subject to limits imposed by its temporal resolution in recording and interpreting irregular vocal cord oscillations. While an analysis of only 25 full images per second is possible with the aid of stroboscopy, high-speed videophotography as presented in this brochure has been able to capture
4000 or more images per second. It is therefore superior to clinical laryngostroboscopy in many areas of speech diagnostics.

The faster resolution of digital high-speed videophotography makes it possible to record periodic deviations in individual vocal cord movements precisely and to observe opening and closing phases in the motion process of the vocal cords without phonation. Examining the use of voice has a great diagnostic importance, especially in evaluating functional dysphonias. In addition, color display options allow not only a functional, but also a detailed morphological evaluation. Combined with a special laryngoscope, a continuous light source, and a PC processing system, the WOLF HRES ENDOCAM 5562 provides researchers with a complete diagnostic system that allows more precise and extended evaluation of physiological und pathological voice parameters at a reasonable price.