Spatio-temporal analysis of irregular vocal fold oscillations: biphonation due to desynchronization of spatial modes.
Spatio-temporal analysis of irregular vocal fold oscillations: biphonation due to desynchronization of spatial modes.
复制标题
不规则声带振荡的时空分析：由于空间模式去同步而导致的双声。
DOI：
10.1121/1.1406498
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
H. Herzel
中科院分区：
文献类型：
--
作者：
Juergen Neubauer;P. Mergell;Ulrich Eysholdt;H. Herzel
本报告是对活体声带病变的不规则时空振动模式的直接观察和模态分析。所观察到的振荡模式定量描述与多线记波图，频谱分析，和时空图。利用经验正交函数将复杂的时空振动模式分解为独立的振动模态。定量地表明，左右不对称或非对称的前后振动模式都可以引起双音化，并引入了“AP（前-后）双音化”一词。发声的例子表明，正常发声的前两个模式充分解释声门动力学。前三种模式可以解释由于左右不对称而引起的双音化的时空振荡模式。高阶模式需要描述由前后振动引起的双音化模式。空间不规则性量化的熵的措施，这是显着高于不规则发声比正常发声。引入了两种非对称性度量：左右非对称性和前后非对称性，分别作为左右声带基频和前后模态基频的比值。这些数量清楚地区分了左右双音和前后双音。本文提出了定量分析体内不规则声带轮廓模式的方法，并补充了以前在计算机模式和体外实验中对振动模式去噪声化的研究结果。
This report is on direct observation and modal analysis of irregular spatio-temporal vibration patterns of vocal fold pathologies in vivo. The observed oscillation patterns are described quantitatively with multiline kymograms, spectral analysis, and spatio-temporal plots. The complex spatio-temporal vibration patterns are decomposed by empirical orthogonal functions into independent vibratory modes. It is shown quantitatively that biphonation can be induced either by left-right asymmetry or by desynchronized anterior-posterior vibratory modes, and the term "AP (anterior-posterior) biphonation" is introduced. The presented phonation examples show that for normal phonation the first two modes sufficiently explain the glottal dynamics. The spatio-temporal oscillation pattern associated with biphonation due to left-right asymmetry can be explained by the first three modes. Higher-order modes are required to describe the pattern for biphonation induced by anterior-posterior vibrations. Spatial irregularity is quantified by an entropy measure, which is significantly higher for irregular phonation than for normal phonation. Two asymmetry measures are introduced: the left-right asymmetry and the anterior-posterior asymmetry, as the ratios of the fundamental frequencies of left and right vocal fold and of anterior-posterior modes, respectively. These quantities clearly differentiate between left-right biphonation and anterior-posterior biphonation. This paper proposes methods to analyze quantitatively irregular vocal fold contour patterns in vivo and complements previous findings of desynchronization of vibration modes in computer modes and in in vitro experiments.
功能性发声困难的基本频率稳定性。
影响因子：
1.4
作者：
Kotby,MN;Titze,IR;Saleh,MM;Berry,DA
通讯作者：
Berry,DA
DOI：
10.1121/1.418246
发表时间：
1997
期刊：
The Journal of the Acoustical Society of America
影响因子：
--
作者：
Titze,IR;Story,BH
通讯作者：
Story,BH