Beschreibung:
<jats:sec><jats:title>Purpose:</jats:title><jats:p> The aim of this study was to investigate the auditory feedback mechanisms and voice quality during phonation in response to a spontaneous pitch change in the auditory feedback. Does the pitch shift reflex (PSR) change voice pitch and voice quality? Quantitative and qualitative voice characteristics were analyzed during the PSR. </jats:p></jats:sec><jats:sec><jats:title>Method:</jats:title><jats:p> Twenty-eight healthy subjects underwent transnasal high-speed video endoscopy (HSV) at 8000 fps during sustained phonation [a]. While phonating, the subjects heard their sound pitched up for 700 cents (interval of a fifth), lasting 300 milliseconds in their auditory feedback. The electroencephalography (EEG), acoustic voice signal, electroglottography (EGG), and high-speed-videoendoscopy (HSV) were analyzed to compare feedback mechanisms for the pitched and unpitched condition of the phonation paradigm statistically. Furthermore, quantitative and qualitative voice characteristics were analyzed. </jats:p></jats:sec><jats:sec><jats:title>Results:</jats:title><jats:p> The PSR was successfully detected within all signals of the experimental tools (EEG, EGG, acoustic voice signal, HSV). A significant increase of the perturbation measures and an increase of the values of the acoustic parameters during the PSR were observed, especially for the audio signal. </jats:p></jats:sec><jats:sec><jats:title>Conclusions:</jats:title><jats:p> The auditory feedback mechanism seems not only to control for voice pitch but also for voice quality aspects. </jats:p></jats:sec>