The influence of gravity on respiratory kinematics during phonation measured by dynamic magnetic resonance imaging

Traser, Louisa; Schwab, Carmen; Burk, Fabian; Özen, Ali Çağlar; Burdumy, Michael; Bock, Michael; Richter, Bernhard; Echternach, Matthias

doi:10.1038/s41598-021-02152-y

Cited by 3 publications

(4 citation statements)

References 29 publications

(48 reference statements)

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“…Nevertheless, it cannot be completely excluded that the voice production mechanisms were influenced by the measurement conditions. Our working group revealed that also professionally trained singers show systematical effects of body positions leading to changes in respiratory kinematics (Traser et al, 2021b), vertical laryngeal position and vocal tract configuration (Traser et al, 2013). Thus, even if singers have been trained to accurately position the vocal tract and larynx during their Estill Voice Training ® education, there may be gravity-related differences between upright and supine Frontiers in Physiology frontiersin.org phonation.…”

Section: General Discussion Of Data Plausibility and Limitationsmentioning

confidence: 97%

Voice efficiency for different voice qualities combining experimentally derived sound signals and numerical modeling of the vocal tract

Fleischer

Rummel²,

Stritt

et al. 2022

Front. Physiol.

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Purpose: Concerning voice efficiency considerations of different singing styles, from western classical singing to contemporary commercial music, only limited data is available to date. This single-subject study attempts to quantify the acoustic sound intensity within the human glottis depending on different vocal tract configurations and vocal fold vibration.Methods: Combining Finite-Element-Models derived from 3D-MRI data, audio recordings, and electroglottography (EGG) we analyzed vocal tract transfer functions, particle velocity and acoustic pressure at the glottis, and EGG-related quantities to evaluate voice efficiency at the glottal level and resonance characteristics of different voice qualities according to Estill Voice Training®.Results: Voice qualities Opera and Belting represent highly efficient strategies but apply different vowel strategies and should thus be capable of predominate orchestral sounds. Twang and Belting use similar vowels, but the twang vocal tract configuration enabled the occurrence of anti-resonances and was associated with reduced vocal fold contact but still partially comparable energy transfer from the glottis to the vocal tract. Speech was associated with highly efficient glottal to vocal tract energy transfer, but with the absence of psychoactive strategies makes it more susceptible to noise interference. Falsetto and Sobbing apply less efficiently. Falsetto mainly due to its voice source characteristics, Sobbing due to energy loss in the vocal tract. Thus technical amplification might be appropriate here.Conclusion: Differences exist between voice qualities regarding the sound intensity, caused by different vocal tract morphologies and oscillation characteristics of the vocal folds. The combination of numerical analysis of geometries inside the human body and experimentally determined data outside sheds light on acoustical quantities at the glottal level.

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Section: General Discussion Of Data Plausibility and Limitationsmentioning

confidence: 97%

Voice efficiency for different voice qualities combining experimentally derived sound signals and numerical modeling of the vocal tract

Fleischer

Rummel²,

Stritt

et al. 2022

Front. Physiol.

Self Cite

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“…Measurement points are defined in Table 3 . For best comparability these measures were selected based on existing literature on the subject ( Traser et al, 2017b , 2020a , 2021 ).…”

Section: Methodsmentioning

confidence: 99%

“…Measurement points are defined in Table 3. For best comparability these measures were selected based on existing literature on the subject (Traser et al, 2017b(Traser et al, , 2020a(Traser et al, , 2021. (Bunch and Chapman, 2000), vital capacity (=VC), forced expiratory volume in 1 s (= FEV1), body height and body-mass-index (=BMI).…”

Section: Image Analysismentioning

confidence: 99%

“…For untrained subjects Hixon et al described a substantial change in respiratory kinematics during sustained utterances between upright and supine position (in supine position the inspiratory braking was solely performed by DPH without support by the inspiratory thorax muscles, which are normally primarily involved in the upright position (Hixon et al, 1976). Such a fundamental change in respiratory kinematics could not be confirmed in professional singers (Traser et al, 2021): The diaphragm was cranially displaced in supine position for both singing and breathing and its motion range increased. Still, regardless of body position, singers maintained their general principles of respiratory kinematics with combined diaphragm and thorax muscle activation for breath support.…”

Section: Limitationsmentioning

confidence: 99%

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Differences of respiratory kinematics in female and male singers – A comparative study using dynamic magnetic resonance imaging

Traser

Schwab²,

Burk³

et al. 2022

Front. Psychol.

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Breath control is an important factor for singing voice production, but pedagogic descriptions of how a beneficial movement pattern should be performed vary widely and the underlying physiological processes are not understood in detail. Differences in respiratory movements during singing might be related to the sex of the singer. To study sex-related differences in respiratory kinematics during phonation, 12 singers (six male and six female) trained in the Western classical singing tradition were imaged with dynamic magnetic resonance imaging. Singers were asked to sustain phonation at five different pitches and loudness conditions, and cross-sectional images of the lung were acquired. In each dynamic image frame the distances between anatomical landmarks were measured to quantify the movements of the respiratory apparatus. No major difference between male and female singers was found for the general respiratory kinematics of the thorax and the diaphragm during sustained phonation. However when compared to sole breathing, male singers significantly increased their thoracic movements for singing. This behavior could not be observed in female singers. The presented data support the hypothesis that professional singers follow sex-specific breathing strategies. This finding may be important in a pedagogical context where the biological sex of singer and student differ and should be further investigated in a larger cohort.

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Characteristics of Diaphragmatic and Chest Wall Motion in People with Normal Pulmonary Function: A Study with Free-Breathing Dynamic MRI

Yang

Sun

Deng

et al. 2022

JCM

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Objective: We aimed to quantitatively study the characteristic of diaphragm and chest wall motion using free-breathing dynamic magnetic resonance imaging (D-MRI) in Chinese people with normal lung function. Methods: 74 male subjects (mean age, 37 ± 11 years old) were prospectively enrolled, and they underwent high-resolution CT(HRCT), pulmonary functional tests (PFTs), and D-MRI in the same day. D-MRI was acquired with a gradient-echo sequence during the quiet and deep breathing. The motion of the diaphragm and chest wall were respectively assessed by measuring thoracic anteroposterior diameter (AP), left–right diameter (LR), cranial–caudal diameter (CC), and thoracic area ratios between end-inspiration and end-expiration. The effect of age, body mass index (BMI), and smoking on respiratory muscle function was also analyzed. Results: The mean ratio of right and left AP was greater than that of LR on three transversal planes during both quiet and deep breathing. The mean ratio at the anterior diaphragm (AND, Quiet: 1.04 ± 0.03; Deep: 1.15 ± 0.09) was weaker than that of the apex (vs. APD, Quiet: 1.08 ± 0.05, p < 0.001; Deep: 1.29 ± 0.12, p < 0.001) and posterior diaphragm (vs. POD, Quiet: 1.09 ± 0.04, p < 0.001; Deep: 1.30 ± 0.12, p < 0.001) both in quiet and deep breathing. Compared with non-smokers, the left AP and thoracic area ratios in smokers were significantly decreased (p < 0.05). However, the ratios of AP, LR, CC, and thoracic area on each plane were similar among groups in different age and BMI. Conclusions: During both quiet and deep breathing, the chest wall motion is prominent in the anteroposterior direction. The motions of diaphragm apex and posterior diaphragm were more prominent than that of the anterior diaphragm. Smoking may affect the respiratory muscle mobility. Dynamic MRI can quantitatively evaluate the motion of respiratory muscles.

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The influence of gravity on respiratory kinematics during phonation measured by dynamic magnetic resonance imaging

Cited by 3 publications

References 29 publications

Voice efficiency for different voice qualities combining experimentally derived sound signals and numerical modeling of the vocal tract

Voice efficiency for different voice qualities combining experimentally derived sound signals and numerical modeling of the vocal tract

Differences of respiratory kinematics in female and male singers – A comparative study using dynamic magnetic resonance imaging

Characteristics of Diaphragmatic and Chest Wall Motion in People with Normal Pulmonary Function: A Study with Free-Breathing Dynamic MRI

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