Phase Difference of Vocally Healthy Subjects in High-Speed Digital Imaging Analyzed With Laryngotopography

Yamauchi, Akihito; Imagawa, Hiroshi; Sakakibara, Ken-Ichi; Yokonishi, Hisayuki; Nito, Takaharu; Yamasoba, Tatsuya; Tayama, Niro

doi:10.1016/j.jvoice.2012.08.002

Cited by 31 publications

(26 citation statements)

References 17 publications

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“…4 On the other hand, DKG has some advantages over VKG. Kymograms can be created at any level of the glottal plane 4,11,31 ; the glottal axis can be adjusted before a kymogram is constructed 11,19,[23][24][25] ; and other HSDI analyses can be done concomitantly using the same HSDI data, which allows parametric comparison across different HSDI analysis methods. 9,10,[23][24][25]31 DKG was selected in the present study because it was one of the serial HSDI researches on normophonic subjects.…”

Section: Discussionmentioning

confidence: 99%

“…9,10,[23][24][25]31 DKG was selected in the present study because it was one of the serial HSDI researches on normophonic subjects. 11,12,32,33 Advantages of DKG included normalization by VFL which facilitates parametric comparison with videostroboscopic studies that frequently use size normalization by VFL. [34][35][36] Normalization by VFL also allows parameterization of more various vibratory characteristics (eg, amplitude, mucosal wave, or IGW).…”

Section: Discussionmentioning

confidence: 99%

“…[1][2][3][4] Moreover, various methods for analysis of HSDI data are now available, resulting in superior qualitative and quantitative evaluation compared with videostroboscopy. These approaches include the glottal width waveform, 5 glottal area waveform, 6 phonovibrography, 7 laryngotopography, [8][9][10][11] and digital kymography (DKG). 12 Among these techniques, DKG analysis is considered to be the best choice for evaluating the temporal characteristics of HSDI data.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Quantitative Analysis of Digital Videokymography: A Preliminary Study on Age- and Gender-Related Difference of Vocal Fold Vibration in Normal Speakers

Yamauchi¹,

Yokonishi²,

Imagawa³

et al. 2015

Journal of Voice

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Quantitative Analysis of Digital Videokymography: A Preliminary Study on Age- and Gender-Related Difference of Vocal Fold Vibration in Normal Speakers

Yamauchi¹,

Yokonishi²,

Imagawa³

et al. 2015

Journal of Voice

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“…The recorded HSDI data were evaluated by frame-by-frame analysis, 23 LTG, 24 SLK and MLK, 25,26 and GAW analysis. 27 The details of these methods have been described elsewhere.…”

Section: Hsdi Analysismentioning

confidence: 99%

Quantification of Vocal Fold Vibration in Various Laryngeal Disorders Using High-Speed Digital Imaging

et al. 2016

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“…as is seen in a one-mass model of the vocal folds (see Flanagan and Landgraf, 1968)]. Rather, their vibration is characterized by phase differences along both the inferior-superior (Baer, 1981;Titze et al, 1993) and anterior-posterior (A-P) dimensions (Tanabe et al, 1975;Krenmayr et al, 2012;Orlikoff et al, 2012;Yamauchi et al, 2013). These phase differences cause time-delayed contacting and de-contacting of the vocal folds along the respective axes.…”

Section: Introductionmentioning

confidence: 99%

Glottal opening and closing events investigated by electroglottography and super-high-speed video recordings

Herbst

Lohscheller

Švec

et al. 2014

Journal of Experimental Biology

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Previous research has suggested that the peaks in the first derivative (dEGG) of the electroglottographic (EGG) signal are good approximate indicators of the events of glottal opening and closing. These findings were based on high-speed video (HSV) recordings with frame rates 10 times lower than the sampling frequencies of the corresponding EGG data. The present study attempts to corroborate these previous findings, utilizing super-HSV recordings. The HSV and EGG recordings (sampled at 27 and 44 kHz, respectively) of an excised canine larynx phonation were synchronized by an external TTL signal to within 0.037 ms. Data were analyzed by means of glottovibrograms, digital kymograms, the glottal area waveform and the vocal fold contact length (VFCL), a new parameter representing the time-varying degree of 'zippering' closure along the anterior-posterior (A-P) glottal axis. The temporal offsets between glottal events (depicted in the HSV recordings) and dEGG peaks in the opening and closing phase of glottal vibration ranged from 0.02 to 0.61 ms, amounting to 0.24-10.88% of the respective glottal cycle durations. All dEGG double peaks coincided with vibratory A-P phase differences. In two out of the three analyzed video sequences, peaks in the first derivative of the VFCL coincided with dEGG peaks, again co-occurring with A-P phase differences. The findings suggest that dEGG peaks do not always coincide with the events of glottal closure and initial opening. Vocal fold contacting and de-contacting do not occur at infinitesimally small instants of time, but extend over a certain interval, particularly under the influence of A-P phase differences.KEY WORDS: Electroglottography, dEGG double peaks, Highspeed video, Vocal fold contact length, Excised canine larynx, Glottal opening and closing events

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Phase Difference of Vocally Healthy Subjects in High-Speed Digital Imaging Analyzed With Laryngotopography

Cited by 31 publications

References 17 publications

Quantitative Analysis of Digital Videokymography: A Preliminary Study on Age- and Gender-Related Difference of Vocal Fold Vibration in Normal Speakers

Quantitative Analysis of Digital Videokymography: A Preliminary Study on Age- and Gender-Related Difference of Vocal Fold Vibration in Normal Speakers

Quantification of Vocal Fold Vibration in Various Laryngeal Disorders Using High-Speed Digital Imaging

Glottal opening and closing events investigated by electroglottography and super-high-speed video recordings

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