Which Mathematical and Physiological Formulas are Describing Voice Pathology: An Overview
Pedersen M*, Jønsson A, Mahmood S and Alexius Agersted A
The Medical Center, Oestergade 18, 1. 1100 Copenhagen, Denmark
- *Corresponding Author:
- Pedersen M
MD. M. Eeg Cand. Stat
The Medical Center
Oestergade 18, 1. 1100 Copenhagen, Denmark
E-mail: [email protected]
Received date: April 19, 2016; Accepted date: May 20, 2016; Published date: May 27, 2016
Citation: Pedersen M, Jønsson A, Mahmood S, Agersted A A (2016) Which Mathematical and Physiological Formulas are Describing Voice Pathology: An Overview. J Gen Pract 4: 253. doi: 10.4172/2329-9126.1000253
Copyright: © 2016 Pedersen M, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
This study focuses upon changes in quantifiable parameters of voice production comparing normal voices and patients with complaints of hoarseness for more than two weeks. Acoustical signals and high speed films were data sources for mathematical and physiological formulas statistics of the voices. The software ”Glottis Analysis Tools” (Erlangen, Germany) includes acoustical measurements and data sources in Glottal Area Waveforms (GAW) and Phonovibrograms (PVG), based on high speed film data. High speed film data were captured with high speed camera and software from Wolf Ltd, Germany. Data with statistical significant difference between 12 healthy voices and 12 patients with complaints of hoarse voices in a prospective case/control study were presented. The commonly used acoustical and physiological parameters showed hardly any statistical difference between the normal persons and the persons with complaints of hoarseness for more than two weeks. This suggests that evidence on physiological and acoustical measures of voice pathology is insufficient. Focus should be upon newer methods and tissue function.