Vocal parameters to determine severity of voice disorders

Parámetros vocales para definir la severidad de una disfonía


Introduction: the severity of dysphonia shows the degree of alteration that a voice has in relation to all the physiological processes involved in the production of sound. It is essential to determine the level of severity to establish a program with the set of exercises required for a proper rehabilitation.

Objective: to understand if the behavior of the different aerodynamic, electroglottographic, acoustic, and vocal self-report parameters allows, or not, to determine the severity of dysphonia.

Method: 55 subjects with different types of dysphonia were evaluated according to aerodynamic, electroglottographic, acoustic, and vocal self-report parameters. The sample was divided into three groups in relation to the severity degree of the pathology. An analysis of variance was applied to compare the behavior of dependent variables with the severity levels of dysphonia. The Post hoc test (Tukey) was applied to the significant variables to determine the differences between the severity levels.

Results: it is possible to determine the level of severity of dysphonia from acoustic parameters such as CPP, HNR, and the ratio of spectral slope 1 / 5-5 / 8Khz. It is also possible to use voice self-report questionnaires such as the VOISS, the VHI, and the VTDS.


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Carlos Alberto Calvache-Mora


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