Automated Electroglottographic Inflection Events Detection. A Pilot Study

Codino, Juliana; Torres, Marı́a E.; Rubin, Adam D.; Jackson-Menaldi, Cristina

doi:10.1016/j.jvoice.2015.10.020

Cited by 3 publications

(1 citation statement)

References 39 publications

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“…Subsequently, the first derivative (see Figure 7) and second derivative (see Figure 4) waveforms were computed for all participants. Following (Codino et al, 2016), the second derivative positive zero-crossing was used to corroborate, by visual inspection and author consensus, the presence or the absence of a "knee" on the EGG wave shape that is manifested as a convexity along the decontacting slope of the EGG pulse. The "knee" was considered to be present if both the convexity along the descending slope and the presence of the second derivative positive zero-crossing were visually identified by both the authors.…”

Section: Egg Wave Shapes Per Participantmentioning

confidence: 99%

Quantitative and Qualitative Electroglottographic Wave Shape Differences in Children and Adults Using Voice Map–Based Analysis

Patel

Ternström

2021

J Speech Lang Hear Res

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Purpose The purpose of this study is to identify the extent to which various measurements of contacting parameters differ between children and adults during habitual range and overlap vocal frequency/intensity, using voice map–based assessment of noninvasive electroglottography (EGG). Method EGG voice maps were analyzed from 26 adults (22–45 years) and 22 children (4–8 years) during connected speech and vowel /a/ over the habitual range and the overlap vocal frequency/intensity from the voice range profile task on the vowel /a/. Mean and standard deviations of contact quotient by integration, normalized contacting speed, quotient of speed by integration, and cycle-rate sample entropy were obtained. Group differences were evaluated using the linear mixed model analysis for the habitual range connected speech and the vowel, whereas analysis of covariance was conducted for the overlap vocal frequency/intensity from the voice range profile task. Presence of a “knee” on the EGG wave shape was determined by visual inspection of the presence of convexity along the decontacting slope of the EGG pulse and the presence of the second derivative zero-crossing. Results The contact quotient by integration, normalized contacting speed, quotient of speed by integration, and cycle-rate sample entropy were significantly different in children compared to (a) adult males for habitual range and (b) adult males and adult females for the overlap vocal frequency/intensity. None of the children had a “knee” on the decontacting slope of the EGG slope. Conclusion EGG parameters of contact quotient by integration, normalized contacting speed, quotient of speed by integration, cycle-rate sample entropy, and absence of a “knee” on the decontacting slope characterize the wave shape differences between children and adults, whereas the normalized contacting speed, quotient of speed by integration, cycle-rate sample entropy, and presence of a “knee” on the downward pulse slope characterize the wave shape differences between adult males and adult females. Supplemental Material https://doi.org/10.23641/asha.15057345

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Section: Egg Wave Shapes Per Participantmentioning

confidence: 99%