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DOI: 10.1055/s-0040-1711327
Changes of oscillation pattern changes due to loudness in patients with vocal fold mass lesions
Introduction Vocal fold mass lesions might affect vocal fold oscillation patterns and therefore voice production. It has been observed before that irregularity values were lower for greater loudness. However, how much oscillation patterns change with gradual changes of loudness has not been understood, in detail.
Material and Methods Eight patients with vocal fold mass lesions were asked to perform a glide from minimum to maxium loudness on the vowel /i/, o on125Hz for male or 250Hz for female voices. During phonation the subjects were recorded with transnasal high speed videoendoscopy (HSV, 20.000fps), electroglottography (EGG), and audio signals.
Results Greatest vocal fold irregularities were observed not at maximum SPL but between minimum and maximum SPL. There was a great disagreement of HSV and EGG derived measures with regard to open quotient and measures of irregularity.
Conclusions The amount of vocal fold irregularities are changing with changing loudness. This should be considered in evaluation of oscillation patterns. The measures from EGG and GAW show much stronger differences in patients with vocal fold mass lesions than in physiologic data. Therefore especially EGG based data has to be interpreted with caution.
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Publication History
Article published online:
10 June 2020
© 2020. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).
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