High-speed Videomicroscopy and Acoustic Analysis of Ex Vivo Vocal Fold Vibratory Asymmetry
نویسندگان
چکیده
1 Center for Laryngeal Surgery and Voice Rehabilitation, Massachusetts General Hospital, Boston, MA, USA 2 Department of Surgery, Harvard Medical School, Boston, MA, USA 3 Department for Phoniatrics and Pedaudiology, University Hospital Erlangen Medical School, Erlangen, Germany 4 Institute of Health Professions, Massachusetts General Hospital, Boston, MA, USA 5 Department of Speech, Language & Hearing Sciences, Boston University, Boston, MA, USA
منابع مشابه
Investigating acoustic correlates of human vocal fold vibratory phase asymmetry through modeling and laryngeal high-speed videoendoscopy.
Vocal fold vibratory asymmetry is often associated with inefficient sound production through its impact on source spectral tilt. This association is investigated in both a computational voice production model and a group of 47 human subjects. The model provides indirect control over the degree of left-right phase asymmetry within a nonlinear source-filter framework, and high-speed videoendoscop...
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PURPOSE In prior work, a manually derived measure of vocal fold vibratory phase asymmetry correlated to varying degrees with visual judgments made from laryngeal high-speed videoendoscopy (HSV) recordings. This investigation extended this work by establishing an automated HSV-based framework to quantify 3 categories of vocal fold vibratory asymmetry. METHOD HSV-based analysis provided for cyc...
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OBJECTIVES/HYPOTHESIS Evaluate the effects of asymmetric superior laryngeal nerve stimulation on the vibratory phase, laryngeal posture, and acoustics. STUDY DESIGN Basic science study using an in vivo canine model. METHODS The superior laryngeal nerves were symmetrically and asymmetrically stimulated over eight activation levels to mimic laryngeal asymmetries representing various levels of...
متن کاملHigh-speed videoendoscopic analysis of relationships between cepstral-based acoustic measures and voice production mechanisms in patients undergoing phonomicrosurgery.
OBJECTIVES There is increased interest in using cepstral-based acoustic measures for objective clinical voice assessment because of their apparent advantages over more time-honored methods, but there is a paucity of information about how these newer measures relate to underlying phonatory mechanisms. METHODS We investigated the relationships between the acoustic cepstral peak magnitude (CPM) ...
متن کاملObservation and analysis of in vivo vocal fold tissue instabilities produced by nonlinear source-filter coupling: a case study.
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 ...
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