Hohm Julian, Döllinger Michael, Bohr Christopher, Kniesburges Stefan, Ziethe Anke
Department for Phoniatrics and Pediatric Audiology, University Hospital Erlangen, Erlangen, Germany.
Department for Phoniatrics and Pediatric Audiology, University Hospital Erlangen, Erlangen, Germany.
J Voice. 2015 Jul;29(4):517.e11-21. doi: 10.1016/j.jvoice.2014.10.001. Epub 2015 May 2.
Within the functional assessment of voice disorders, an objective analysis of measured parameters from audio, electroglottographic (EGG), or visual signals is desired. In a typical clinical situation, reliable objective analysis is not always possible due to missing standardization and unknown stability of the clinical parameters. The aim of this study was to investigate the robustness/stability of measured clinical parameters of the audio and EGG signals in a typical clinical setting to ensure a reliable objective analysis. In particular, the influence of F0 and of the sequence length on several definitions of jitter and shimmer will be analyzed.
Seventy-four young healthy women produced a sustained vowel /a/ and an upward triad with abrupt changeovers. Different sequence lengths (100, 150, 500, and 1000 ms) of sustained phonation and triads (100 and 150 ms) were extracted from the audio and EGG signals. In total, six variations of jitter and four variations of shimmer parameters were analyzed.
Jitter%, Jitter11p, and JitterPPQ of the audio signal as well as Jittermean, Shimmer, and Shimmer11p of the EGG signal are unaffected by both sequence length and F0.
Influence of F0 and sequence length on several perturbation measures of the audio and EGG signals was identified. For an objective clinical voice assessment, unaffected definitions of jitter and shimmer should be preferred and applied to enable comparability between different recordings, examinations, and studies.
在嗓音障碍的功能评估中，需要对来自音频、电声门图（EGG）或视觉信号的测量参数进行客观分析。在典型的临床情况下，由于缺乏标准化以及临床参数稳定性未知，可靠的客观分析并不总是可行的。本研究的目的是在典型临床环境中研究音频和EGG信号测量的临床参数的稳健性/稳定性，以确保可靠的客观分析。特别地，将分析基频（F0）和序列长度对几种抖动和闪烁定义的影响。
74名年轻健康女性发出持续元音/a/和带有突变的上行三和弦。从音频和EGG信号中提取持续发声和三和弦（100和150毫秒）的不同序列长度（100、150、500和1000毫秒）。总共分析了六种抖动变化和四种闪烁参数变化。
音频信号的抖动百分比（Jitter%）、11点抖动（Jitter11p）和周期-周期抖动（JitterPPQ）以及EGG信号的平均抖动（Jittermean）、闪烁（Shimmer）和11点闪烁（Shimmer11p）均不受序列长度和F0的影响。
确定了F0和序列长度对音频和EGG信号的几种微扰测量的影响。对于客观的临床嗓音评估，应优先选用不受影响的抖动和闪烁定义并应用，以实现不同录音、检查和研究之间的可比性。
