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Daily voice use of patients with NPVH (Van Stan et al., 2021) ...
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Daily voice use of patients with NPVH (Van Stan et al., 2021) ...
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Differences Between Female Singers With Phonotrauma and Vocally Healthy Matched Controls in Singing and Speaking Voice Use During 1 Week of Ambulatory Monitoring
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In: Am J Speech Lang Pathol (2021)
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Estimation of Subglottal Pressure, Vocal Fold Collision Pressure, and Intrinsic Laryngeal Muscle Activation From Neck-Surface Vibration Using a Neural Network Framework and a Voice Production Model
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In: Front Physiol (2021)
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Virtual vocal function exercises (Van Stan et al., 2020) ...
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Virtual vocal function exercises (Van Stan et al., 2020) ...
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Glottal Aerodynamics Estimated From Neck-Surface Vibration in Women With Phonotraumatic and Nonphonotraumatic Vocal Hyperfunction
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In: J Speech Lang Hear Res (2020)
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Using Ambulatory Voice Monitoring to Investigate Common Voice Disorders: Research Update
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Using Ambulatory Voice Monitoring to Investigate Common Voice Disorders: Research Update
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In: Frontiers Research Foundation (2015)
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Modeling the effects of a posterior glottal opening on vocal fold dynamics with implications for vocal hyperfunctiona)
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Subglottal Impedance-Based Inverse Filtering of Voiced Sounds Using Neck Surface Acceleration
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Investigating acoustic correlates of human vocal fold vibratory phase asymmetry through modeling and laryngeal high-speed videoendoscopya
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Observation and analysis of in vivo vocal fold tissue instabilities produced by nonlinear source-filter coupling: A case studya
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Abstract:
Different source-related factors can lead to vocal fold instabilities and bifurcations referred to as voice breaks. Nonlinear coupling in phonation suggests that changes in acoustic loading can also be responsible for this unstable behavior. However, no in vivo visualization of tissue motion during these acoustically induced instabilities has been reported. Simultaneous recordings of laryngeal high-speed videoendoscopy, acoustics, aerodynamics, electroglottography, and neck skin acceleration are obtained from a participant consistently exhibiting voice breaks during pitch glide maneuvers. Results suggest that acoustically induced and source-induced instabilities can be distinguished at the tissue level. Differences in vibratory patterns are described through kymography and phonovibrography; measures of glottal area, open∕speed quotient, and amplitude∕phase asymmetry; and empirical orthogonal function decomposition. Acoustically induced tissue instabilities appear abruptly and exhibit irregular vocal fold motion after the bifurcation point, whereas source-induced ones show a smoother transition. These observations are also reflected in the acoustic and acceleration signals. Added aperiodicity is observed after the acoustically induced break, and harmonic changes appear prior to the bifurcation for the source-induced break. Both types of breaks appear to be subcritical bifurcations due to the presence of hysteresis and amplitude changes after the frequency jumps. These results are consistent with previous studies and the nonlinear source-filter coupling theory.
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Keyword:
Speech Production [70]
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URL: https://doi.org/10.1121/1.3514536 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3055289 http://www.ncbi.nlm.nih.gov/pubmed/21303014
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Use of Neck Strap Muscle Intermuscular Coherence as an Indicator of Vocal Hyperfunction
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A virtual trajectory model predicts differences in vocal fold kinematics in individuals with vocal hyperfunction1
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