Ulrich Eysholdt 1 , Michael Doellinger 1 , Joerg Lohscheller 1

1 University Hospital, Dept. Phoniatrics, Erlangen

The source of voice sound is the vibration of the vocal folds. In case of any voice disorder the examination of the sound source is mandatory. While the most wide-spread stroboscopy is very useful in normal or near-normal voice, i.e. harmonic, periodic vibrations, it fails more and more with increasing vibration pathology. High speed recordings (HSR) are able to visualize irregular vibrations with real time resolution. However, due to expenditure of time HSR are difficult to handle in a clinical environment. Even when replayed at slow motion high speed recordings are less suggestive for the examiner, as motion is less obvious to human perception than static object features are. Under the name phonovibrogram (PVG) we developed an image processing procedure to make HSR clinically more applicable. The PVG concentrates the motion of a complete recording into one single image at the cost of loss of the direct anatomical information. PVG shows a remarkable discriminatory power in voice pathology. It works like a fingerprint of the vibration and - at the first time - allows to automatically classify irregular vibrations with very high reliability from endoscopic HSR.

Leonardo Bocchi 1 , Marcello Calisti 1 , Claudia Manfredi 1 , Lorenzo Mirabile 2 , Giorgio Peretti 3

1 Università degli Studi di Firenze, Electronics and Telecommunications, Firenze

2 Children Hospital A. Meyer, , Firenze

3 Spedali Civili, , Brescia

Thomas Woellner 1 , Andreas Krenmayr 2 , Nicola Supper 1 , Patrick Zorowka 1

1 Medical University Innsbruck, Clinic for Hearing, Voice and Speech Disorders, Innsbruck

2 University of Innsbruck, C. Doppler Laboratory for Active Implantable Systems, Institute of Ion Physics and Applied Physics, Innsbruck