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Analysis of the relationship between emotion intensity and electrophysiology parameters during a voice examination of opera singers

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Krasnodębska P., Szkiełkowska A., Pollak A., Romaniszyn-Kania P., Bugdol M. N., Bugdol M., Mitas A. W.
International Journal of Occupational Medicine and Environmental Health
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2024
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vol. 37
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issue 1
84-97
EN
Objectives Emotions and stress affect voice production. There are only a few reports in the literature on how changes in the autonomic nervous system affect voice production. The aim of this study was to examine emotions and measure stress reactions during a voice examination procedure, particularly changes in the muscles surrounding the larynx. Material and Methods The study material included 50 healthy volunteers (26 voice workers – opera singers, 24 control subjects), all without vocal complaints. All subjects had good voice quality in a perceptual assessment. The research procedure consisted of 4 parts: an ear, nose, and throat (ENT)‑phoniatric examination, surface electromyography, recording physiological indicators (heart rate and skin resistance) using a wearable wristband, and a psychological profile based on questionnaires. Results The results of the study demonstrated that there was a relationship between positive and negative emotions and stress reactions related to the voice examination procedure, as well as to the tone of the vocal tract muscles. There were significant correlations between measures describing the intensity of experienced emotions and vocal tract muscle maximum amplitude of the cricothyroid (CT) and sternocleidomastoid (SCM) muscles during phonation and non-phonation tasks. Subjects experiencing eustress (favorable stress response) had increased amplitude of submandibular and CT at rest and phonation. Subjects with high levels of negative emotions, revealed positive correlations with SCMmax during the glissando. The perception of positive and negative emotions caused different responses not only in the vocal tract but also in the vegetative system. Correlations were found between emotions and physiological parameters, most markedly in heart rate variability. A higher incidence of extreme emotions was observed in the professional group. Conclusions The activity of the vocal tract muscles depends on the type and intensity of the emotions and stress reactions. The perception of positive and negative emotions causes different responses in the vegetative system and the vocal tract.
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Personality traits in singers performing various music styles and with different singing status

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Sielska-Badurek E. M., Sobol M., Okulicz-Kozaryn K., Gołda P., Cielecka A.
International Journal of Occupational Medicine and Environmental Health
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2023
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vol. 36
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issue 4
541-550
EN
Objectives Objective was to find personality traits in singers performing various music styles and with different singing status. Material and Methods The study consisted of 87 singers (66 females, 21 males; age: M±SD 25.5±8.2 years; 40 students, 22 professionals and 25 amateurs; 38 classical singers, 42 contemporary commercial music [CCM] singers; 55 solo singers and 22 choral singers). Participants filled in the NEO Five-Factor Inventory questionnaire and demographic information form. Results Median values compared to the Polish general population, suggest that solo, CCM, student and professional singers have a high level of conscientiousness. Those who sing in a choir, classical music, amateurs and students have relatively high level of agreeableness. High level of extraversion is observed among CCM singers and students. Students score higher on extraversion then professionals (p < 0.001). Professionals score higher on extraversion then amateurs (p < 0.01). Professionals less frequently than amateurs and students score high on agreeableness (p < 0.001). High scores on conscientiousness are significantly higher among professionals and students compared to amateurs (p < 0.001 in both cases). Solo singers have higher level of conscientiousness (p < 0.001) and openness (p < 0.001) and lower neuroticism (p < 0.01) than choral singers. Classical singers more often than CCM singers score low on openness (p < 0.01) and high on agreeableness (p < 0.01). Conclusions Classical singers have lower level of openness and higher level of agreeableness than CCM singers. Neuroticism is higher among choir than solo singers and conscientiousness is higher among solo than choir singers. Amateurs had the highest level of neuroticism and the lowest level of conscientiousness as compared with professional singers and students.
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