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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/369

Title: The Dysphonia Severity Index: An Objective Measure of Vocal Quality Based on a Multiparameter Approach
Authors: Wuyts, Floris
De Bodt, Marc
Molenberghs, Geert
Remacle, M.
Heylen, Louis
Millet, B.
Van Lierde, C.
Raes, J.
Van de Heyning, Paul
Keywords: Medical statistics
Multivariate data
Issue Date: 2000
Publisher: AMER SPEECH-LANGUAGE-HEARING ASSOC
Citation: Journal of Speech Language and Hearing Research, 43(3). p. 796-809
Abstract: The vocal quality of a patient is modeled by means of a Dysphonia Severity Index (DSI), which is designed to establish an objective and quantitative correlate of the perceived vocal quality. The DSI is based on the weighted combination of the following selected set of voice measurements: highest frequency (F0-High in Hz), lowest intensity (I-Low in dB), maximum phonation time (MPT in s), and jitter (%). The DSI is derived from a multivariate analysis of 387 subjects with the goal of describing, purely based on objective measures, the perceived voice quality. It is constructed as DSI = 0.13 × MPT + 0.0053 × F0-High − 0.26 × I-Low − 1.18 × Jitter (%) + 12.4. The DSI for perceptually normal voices equals +5 and for severely dysphonic voices −5. The more negative the patient's index, the worse is his or her vocal quality. As such, the DSI is especially useful to evaluate therapeutic evolution of dysphonic patients. Additionally, there is a high correlation between the DSI and the Voice Handicap Index score.
URI: http://hdl.handle.net/1942/369
Link to publication: https://www.researchgate.net/publication/12442421_The_Dysphonia_Severity_Index_An_Objective_Measure_of_Vocal_Quality_Based_on_a_Multiparameter_Approach
ISI #: 000087579400017
ISSN: 1092-4388
Category: A1
Type: Journal Contribution
Validation: ecoom, 2001
Appears in Collections: Research publications

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