Electroglottographic wavegrams: A technique for visualizing vocal fold dynamics noninvasively
Electroglottographic wavegrams: A technique for visualizing vocal fold dynamics noninvasively
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DOI：
10.1121/1.3493423
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发表时间：
2010-11-01
影响因子：
2.4
通讯作者：
Svec, Jan G.
中科院分区：
文献类型：
--
作者：
Herbst, Christian T.;Fitch, W. Tecumseh S.;Svec, Jan G.
介绍了一种分析和显示电声门图（EGG）信号（及其一阶导数，DEGG）的方法：电声门图波形图（以下简称波形图）。为了构建波形图，测量时变基频并识别连续的个体声门周期。每个周期在持续时间和幅度上进行局部归一化，信号值通过颜色强度进行编码，并且周期被连接以在单个图像中显示整个语音样本，类似于声音频谱学。波图提供了一种直观的手段，快速评估声带接触现象及其随时间的变化。声带接触的变化在这里表现为一系列事件，而不是单一的现象，发生在一定的时间内，并随着音高，响度和音域的变化而变化。多个DEGG峰在波形图中显示出系统的行为，表明声带振荡机制的微妙变化。因此，EGG波图有望揭示更多的信息声带接触和去接触事件比以前的方法。(C)2010年美国声学学会。[DOI：10.1121/1.3493423]
A method for analyzing and displaying electroglottographic (EGG) signals (and their first derivative, DEGG) is introduced: the electroglottographic wavegram ("wavegram" hereafter). To construct a wavegram, the time-varying fundamental frequency is measured and consecutive individual glottal cycles are identified. Each cycle is locally normalized in duration and amplitude, the signal values are encoded by color intensity and the cycles are concatenated to display the entire voice sample in a single image, similar as in sound spectrography. The wavegram provides an intuitive means for quickly assessing vocal fold contact phenomena and their variation over time. Variations in vocal fold contact appear here as a sequence of events rather than single phenomena, taking place over a certain period of time, and changing with pitch, loudness and register. Multiple DEGG peaks are revealed in wavegrams to behave systematically, indicating subtle changes of vocal fold oscillatory regime. As such, EGG wavegrams promise to reveal more information on vocal fold contacting and de-contacting events than previous methods. (C) 2010 Acoustical Society of America. [DOI:10.1121/1.3493423]