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3D-FV-FE Aeroacoustic Larynx Model for Investigation of Functional Based Voice Disorders
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In: Front Physiol (2021)
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Vocal fold oscillation pattern changes related to loudness in patients with vocal fold mass lesions
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In: J Otolaryngol Head Neck Surg (2020)
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Vocal fold oscillation pattern changes related to loudness in patients with vocal fold mass lesions
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In: Journal of otolaryngology, head & neck surgery. - 49, 1 (2020) , 80, ISSN: 1916-0216 (2020)
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Abstract:
Introduction Vocal fold mass lesions can affect vocal fold oscillation patterns and therefore voice production. It has been previously observed that perturbation values from audio signals were lower with increased loudness. However, how much the oscillation patterns change with gradual alteration of loudness is not yet fully understood. Material and methods Eight patients with vocal fold mass lesions were asked to perform a glide from minimum to maximum loudness on the vowel /i/, ƒo of 125 Hz for male or 250 Hz for female voices. During phonation the subjects were simultaneously recorded with transnasal high speed videoendoscopy (HSV, 20,000 fps), electroglottography (EGG), and an audio recording. Based on the HSV material the Glottal Area Waveform (GAW) was segmented and GAW parameters were computed. Results The greatest vocal fold irregularities were observed at different values between minimum and maximum sound pressure level. There was a relevant discrepancy between the HSV and EGG derived open quotients. Furthermore, the EGG derived sample entropy and GAW values also evidenced different behavior. Conclusions The amount of vocal fold irregularity changes with varying loudness. Therefore, any evaluation of the voice should be performed under different loudness conditions. The discrepancy between EGG and GAW values appears to be much stronger in patients with vocal fold mass lesions than those with normal physiological conditions. Level of evidence 4.
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URL: https://nbn-resolving.org/urn:nbn:de:bsz:25-freidok-1700978
https://doi.org/10.1186/s40463-020-00481-y
https://freidok.uni-freiburg.de/data/170097
https://www.freidok.uni-freiburg.de/dnb/download/170097
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Acoustic and aerodynamic coupling during phonation in MRI-based vocal tract replicas
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In: Applied sciences. - 9, 17 (2019) , 3562, ISSN: 2076-3417 (2019)
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Laryngeal evidence for the first and second passaggio in professionally trained sopranos
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In: PLoS ONE. 12, 5 (2017), e0175865, DOI 10.1371/journal.pone.0175865, issn: 1932-6203 (2017)
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Morphometric differences of vocal tract articulators in different loudness conditions in singing
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In: PLOS ONE. - 11, 4 (2016) , e0153792, ISSN: 1932-6203 (2016)
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