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To perform a systematic literature review to evaluate the type and timing of therapy for vocal fold paresis/paralysis after thyroidectomy and develop a primary decision-making pathway.Meta-analysis.Four databases and one journal were searched using the key words of “thyroidectomy,” “vocal cord paresis/paralysis,” and “therapy.” Study quality was evaluated using the Cochrane Collaboration's risk of...
Vocal tract can be modeled by analyzing the speech signals. The accuracy of this method depends on specifying and optimizing the articulatory parameters properly. A kind of vocal tract model, which is described in a midsagittal plane, generally contains 8-12 articulatory parameters, which have close relations with the acoustic formants. Calculating the first four formants frequency according to these...
This paper proposes the voice source signal process technology platform based on pitch synchronous, in which mainly to complete extraction of glottal wave analysis and synthesis, including voiced and unvoiced detection, glottal closure instants detection in the voiced segments, and extraction of glottal wave, glottal wave coding and synthesis. Meanwhile, LF model and its parameters would be analyzed...
The purpose of this article is to present the results of a controlled study of the day-to-day variabilities of three acoustic parameters (jitter, shimmer, and normalized noise energy), and two electroglottographic parameters (contact quotient and contact quotient perturbation) for vowels produced at three vocal efforts (low, normal, high). Data were obtained with use of a sophisticated bilinear interpolation...
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