KX-Kymo Extras – Videoendoscopy from KETTEX

Camera KX-Kymo

KX-Kymo is a stroboscopic-kymographic camera that can perform both: stroboscopic examinations of the vocal cords and kymographic imaging with still light source. The strobe function is the same as the KX-02 camera.

What is kymography good for?
A kymogram is unique information for a phoniatrist, providing the doctor with more information than stroboscopy and, in addition, it can be obtained even in cases where the stroboscopy examination does not work due to the inability to obtain a basetone. A kymogram requires a recording of 100 ms, while 100 ms is the shortest time in stroboscopy for which a basetone can be obtained, and the video must be at least a few seconds long. Kymography has a scientific justitification, of course and there are tons of papers about this method and results in clinical cases.

What exactly is a kymogram?
The visual information provided to the physician consists of two parts. The first part is an overview image used for navigation on the vocal cords and to indicate the specific location on the vocal cords from which the kymogram is obtained. The second part is the kymogram itself. A kymogram is therefore visual data from a high-speed camera, in our case 6500 frames per second, where an image corresponding to the area below the green line on the overview image is superimposed. So, essentially, 6500 times per second, we look at what is happening below the green line, and for greater clarity, we display all these image segments from the area below the green line one below the other.

On a kymogram, the doctor can observe whether both vocal cords are vibrating, whether the amplitude is the same, how large it is, how long the vocal cords remain open compared to the duration of closure, and whether the vocal cords close completely at all. They can observe the symmetry of the vibration, the phase shift of the vibration, how long a single vibration lasts, and how this duration changes. Advanced features suitable for observation include the sharpness of the peaks—both medial and lateral—as well as various aberrations.

All of these findings provide the doctor with more information than laryngostroboscopy alone.

Regulatory

The camera passed all the test required by MDR regarding electric safety, EMC and protection in accredited lab. The camera has a CE Mark, it is registered in EUDAMED and it is available for the whole EU market.

1. Moore, P. and H. von Leden, Dynamic variations of the vibratory pattern in the normal larynx. Folia Phoniatr. (Basel), 1958. 10(4): p. 205–238.

2. Dunker, E. and B. Schlosshauer, Unregelmässige Stimmlippenschwingungen bei funktionellen Stimmstörungen. Z. Laryng. Rhinol. Otol, 1961. 40: p. 919–934.

3. Dunker, E. and B. Schlosshauer, Irregularities of the laryngeal vibratory pattern in healthy and hoarse persons, in Research potentials in voice physiology, D.W. Brewer, Editor. 1964, State University of New York: Syracuse, NY. p. 151–184.

4. Tanabe, M., N. Isshiki, and K. Kitajima, Vibratory pattern of the vocal cord in unilateral paralysis of the cricothyroid muscle. An experimental study. Acta Otolaryngol (Stockh), 1972. 74: p. 339–345.

5. Tanabe, M., et al., Analysis of high-speed motion pictures of the vocal folds. Folia Phoniatr. (Basel), 1975. 27: p. 77–87.

6. Childers, D.G., A. Paige, and G.P. Moore, Laryngeal vibration patterns. Machine-aided measurements from high-speed film. Arch. Otolaryngol, 1976. 102(7, Jul): p. 407–410.

7. Hirano, M., et al., Movements of selected points on a vocal fold during vibration. Folia Phoniatr. (Basel), 1980. 32: p. 39–50.

8. Gall, V., D. Gall, and J. Hanson, Larynx-Fotokymografie. [Larynx-Photokymography]. Arch. klin. exp. Ohr. -,Nas. – u. Kehlk. Heilk, 1971. 200(1): p. 34–41.

9. Gall, V. and J. Hanson, Bestimmung physikalischer Parameter der Stimmlippenschwingungen mit Hilfe der Larynxphotokymographie. [Finding physical parameters of vocal cord vibration by use of laryngeal photokymography]. (In German). Folia Phoniatr. (Basel), 1973. 25(6): p. 450–459.

10. Gall, V. and C. Freigang, Zur Larynx-Fotokymografie: Demonstration einiger pathologischer Kehlkopf-Befunde. Mschr. Ohr. Hk. (Wien), 1974. 108(3): p. 114–122.

11. Gall, V., Fotokymografische Befunde bei funktionellen Dysphonien, Kehlkopflähmungen und Stimmlippentumoren [Photokymographic statements in functional voice disorders, laryngeal paralysis and vocal cord tumors]. Folia Phoniatr. (Basel), 1978. 30(1): p. 28–35.

12. Tanabe, M., N. Isshiki, and M. Sawada, Damping ratio of the vocal cord. Folia Phoniatr. (Basel), 1979. 31(1): p. 27–34.

13. Baer, T., A. Löfqvist, and N.S. McGarr, Laryngeal vibrations: a comparison between high-speed filming and glottographic techniques. J. Acoust. Soc. Am, 1983. 73(4): p. 1304–1308.

14. Gall, V., Strip kymography of the glottis. Arch. Otorhinolaryngol, 1984. 240(3): p. 287–293.

15. Gall, V., Glottis-Kymographie. (Habilitation). 1984, Halle-Wittenberg: Martin-Luther-Universität.

16. Gall, V. and M. Reinsch, Glottiskymographische Parameter bei Kehlkopflähmungen, in Proceedings. The XII th Congress of the Union of European Phoniatricians, 1985, September 12-15, Poznan, Poland, A. Pruszewicz, Editor. 1985, The Union of the European Phoniatricians, the Phoniatric Section of the Polish Otolaryngological Society. p. 40–45.

17. Gross, M., Larynxfotokymographie. Sprache – Stimme – Gehör, 1985. 9: p. 112–113.

18. Gross, M., Endoskopische Larynx-Fotokymografie. 1988, Bingen, Germany: Renate Gross Verlag.

19. Schultz-Coulon, H.-J., Mikrofotokymographie des Kehlkopfes. Sprache – Stimme – Gehör, 1990. 14: p. 4–10.

20. Isogai, Y., X-ray stroboscopy and laryngostrobography, in Proceedings of the 3rd International Symposium on Phonosurgery, June 26-28, 1994 Kyoto, Japan. 1994, International Association of Phonosurgeons. p. 238–239.

21. Isogai, Y., New techniques of laryngostroboscopy: X-ray stroboscopy, 3-D laryngostroboscopy, and laryngostrobography, in Transactions of the American Broncho-Esophagological Association — 1995. 1995. p. 242–247.

22. Isogai, Y., Analysis of the vocal fold vibration by the laryngo-strobography–improvements of the analytic function. (In Japanese). Larynx Jpn, 1996. 8: p. 27–32.

23. Isogai, Y., Laryngostroboscopy–observation of the travelling wave of the mucous membrane. (In Japanese). Larynx Jpn, 1996. 8: p. 84–91.

24. Schutte, H.K. and J.G. Švec, Video-kymography — a modern imaging system for analyzing regular and irregular vocal fold vibrations. (Abstract), in Proceedings of the XXth Congress of the Collegium Medicum Theatri, Santa Fe, NM 1994. 1994.

25. Švec, J.G. and H.K. Schutte, High-speed line-scanning technique for investigation of vocal fold vibration (videokymography), in Proceedings of the 32nd Czech Conference on Acoustics SPEECH – MUSIC – HEARING, Prague, September 23-26, 1995, A. Melka, Z. Otčenášek, and J. Štěpánek, Editors. 1995, Czech Acoustical Society: Prague. p. 71–74.

26. Švec, J.G. and H.K. Schutte, Videokymography: high-speed line scanning of vocal fold vibration. Journal of Voice, 1996. 10(2): p. 201–205.

27. Schutte, H.K., J.G. Švec, and F. Šram, Videokymography: imaging and quantification of regular and irregular vocal fold vibrations, in Sydney ’97 – XVI. World Congress of Otorhinolaryngology Head and Neck Surgery. Proceedings, vol. 2, G. McCafferty, W. Coman, and R. Carroll, Editors. 1997, Monduzzi Editore: Bologna. p. 1739–1742.

28. Schutte, H.K., J.G. Švec, and F. Šram, Videokymography – a modern imaging system for analyzing regular and irregular vibrations, in Aktuelle phoniatrisch-pädaudiologische Aspecte 1996, M. Gross and U. Eysholdt, Editors. 1997, Verlag Abteilung Phoniatrie, Universitäts-HNO-Klinik: Göttingen. p. 272–274.

29. Schutte, H.K., J.G. Švec, and F. Šram, Videokymography: research and clinical issues. Logopedics Phoniatrics Vocology, 1997. 22(4): p. 152–156.

30. Šram, F., H.K. Schutte, and J.G. Švec, Clinical applications of videokymography, in Sydney ’97 – XVI. World Congress of Otorhinolaryngology Head and Neck Surgery. Proceedings, vol. 2, G. McCafferty, W. Coman, and R. Carroll, Editors. 1997, Monduzzi Editore: Bologna. p. 1681–1684.

31. Švec, J.G., H.K. Schutte, and F. Šram, Videokymography: high-speed line scanning of vocal fold vibration, in Sydney ’97 – XVI. World Congress of Otorhinolaryngology Head and Neck Surgery. Proceedings, vol. 2, G. McCafferty, W. Coman, and R. Carroll, Editors. 1997, Monduzzi Editore: Bologna. p. 1685–1688.

32. Švec, J.G., H.K. Schutte, and F. Šram, Introduction to videokymography. (Video tape). 1997, Prague: Medical Healthcom.

33. Wittenberg, T., Automatic motion extraction from laryngeal kymograms, in Advances in Quantitative Laryngoscopy. Proceedings of the 2nd ‘Round Table’ Advances in Quantitative Laryngoscopy using Motion-, Image- and Signal Analysis, Erlangen 1997., T. Wittenberg, et al., Editors. 1997, Abteilung Phoniatrie, Universitäts-HNO-Klinik Göttingen, Germany. p. 21–28.

34. Lee, J.S., et al., Development of videostrobokymography for the quantitative analysis of laryngeal vibratory pattern. Medinfo, 1998. 9(Pt 2): p. 1022–1024.

35. Schutte, H.K., J.G. Švec, and F. Šram, First results of clinical application of videokymography. Laryngoscope, 1998. 108(8, Pt.1, August): p. 1206–1210.

36. Stelzig, Y., V. Gall, and W. Cieslar-Rakus, Die Kymografie im klinischen Einsatz und in der Stimmforschung, in Aktuelle phoniatrisch-pädaudiologische Aspekte 1998/99. Band 6, M. Gross, Editor. 1999, Median Verlag: Heidelberg. p. 59–62.

37. Sung, M.W., et al., Videostrobokymography: a new method for the quantitative analysis of vocal fold vibration. Laryngoscope, 1999. 109(11): p. 1859–1863.

38. Šram, F., J.G. Švec, and H.K. Schutte, Possibilities for use of videokymography in laryngologic and phoniatric practice, in Communication and its disorders: a science in progress. Proceedings 24th Congress International Association of Logopedics and Phoniatrics, Amsterdam, the Netherlands, August 23-27, 1998. Vol. I, P.H. Dejonckere and H.F.M. Peters, Editors. 1999, International Association of Logopedics and Phoniatrics. p. 256–259.

39. Švec, J.G. and H.K. Schutte, Videokymography: high-speed line scanning of vocal fold vibration. Ann. Sc. Univ. Fr. -C, 1999. XV(1): p. 9–18.

40. Švec, J.G., H.K. Schutte, and F. Šram, Variability of vibration of normal vocal folds as seen in videokymography, in Communication and its disorders: a science in progress. Proceedings 24th Congress International Association of Logopedics and Phoniatrics, Amsterdam, the Netherlands, August 23-27, 1998. Vol. I, P.H. Dejonckere and H.F.M. Peters, Editors. 1999, International Association of Logopedics and Phoniatrics. p. 122–125.

41. Švec, J.G., H.K. Schutte, and F. Šram, Úvod do videokymografie, in Biomechanika člověka ’98. VII. konference České společnosti pro biomechaniku. Proceedings, K. Jelen and J. Pejšová, Editors. 1999, Univerzita Karlova v Praze, Fakulta tělesné výchovy a sportu pro Českou společnost pro biomechaniku: Praha. p. 231–234.

42. Švec, J.G., F. Šram, and H.K. Schutte, Videokymografie: nová vysokofrekvenční metoda vyšetřování kmitů hlasivek. [Videokymography: a new high-speed method for the examination of vocal-fold vibrations]. Otorinolaryngol. (Prague), 1999. 48(3): p. 155–162.

43. Tigges, M., et al., Imaging of vocal fold vibration by digital multi-plane kymography. Comput. Med. Imaging. Graph, 1999. 23(6): p. 323–330.

44. Jiang, J.J., et al., Quantitative study of mucosal wave via videokymography in canine larynges. Laryngoscope, 2000. 110(9): p. 1567–1573.

45. Larsson, H., et al., Vocal fold vibrations: high-speed imaging, kymography, and acoustic analysis: a preliminary report. Laryngoscope, 2000. 110(12): p. 2117–2122.

46. Wittenberg, T., et al., Functional imaging of vocal fold vibration: digital multislice high-speed kymography. J. Voice, 2000. 14(3): p. 422–442.

47. Lee, J.S., et al., A method for assessing the regional vibratory pattern of vocal folds by analysing the video recording of stroboscopy. Med. Biol. Eng. Comput, 2001. 39(3): p. 273–278.

48. Lindestad, P.-Å., et al., Voice source characteristics in Mongolian “throat singing” studied with high-speed imaging technique, acoustic spectra, and inverse filtering. J. Voice, 2001. 15(1): p. 78–85.

49. Neubauer, J., et al., Spatio-temporal analysis of irregular vocal fold oscillations: biphonation due to desynchronization of spatial modes. J. Acoust. Soc. Am, 2001. 110(6): p. 3179–3192.

50. Peretti, G., et al., Videokymography. Acta Phon. Lat, 2001. 24: p. 71–77.

51. Tsuji, D.H. and L.U. Sennes, Videoquimografia de laringe: novo método de avaliacao da vibracao cordal. Arquivos da Fundacao Otorrinolaringologia, 2001.

52. Hertegard, S., H. Larsson, and T. Wittenberg, High-speed imaging: applications and development. Logoped. Phoniatr. Vocol, 2003. 28(3): p. 133–139.

53. Kim, D.Y., et al., Videostrobokymographic analysis of benign vocal fold lesions. Acta Otolaryngol (Stockh), 2003. 123(9): p. 1102–1109.

54. Qiu, Q., et al., An automatic method to quantify the vibration properties of human vocal folds via videokymography. Folia Phoniatr. Logop, 2003. 55(3): p. 128–136.

55. Šram, F., et al., Poruchy hlasu. Iatrike Techne, 2003. 1/2003: p. LVI–LXII.

56. Borch, D.Z., et al., Vocal fold vibration and voice source aperiodicity in ‘dist’ tones: a study of a timbral ornament in rock singing. Logoped. Phoniatr. Vocol, 2004. 29(4): p. 147–153.

57. Fujita, R., A.E. Ferreira, and C. Sarkovas, Videokymography assessment of vocal fold vibration before and after hydration. Rev. Bras. Otorrinolaringol, 2004. 70(6): p. 742–746.

58. Hertegard, S., What have we learned about laryngeal physiology from high-speed digital videoendoscopy? Current Opinion in Otolaryngology & Head and Neck Surgery, 2005. 13(3): p. 152–156.

59. Kendall, K.A., M.M. Browning, and S.M. Skovlund, Introduction to high-speed imaging of the larynx. Current Opinion in Otolaryngology & Head and Neck Surgery, 2005. 13(3): p. 135–137.

60. Pontes, P.A., et al., The influence of the position of the laryngeal endoscope laryngeal on videokymography. Brazilian Journal of Otorhinolaryngology, 2005. 71(6): p. 803–811.

61. Tigges, M., B. Richter, and T. Wittenberg, Kymographische Darstellung der Stimmlippenschwingungen. (Kymographic Imaging of Vocal Fold Vibration.) (In German). Sprache – Stimme – Gehör, 2005. 29(1): p. 9–14.

62. Wittenberg, T., et al., Hochgeschwindigkeitskameras für die Stimmdiagnose – Status Quo und neue Perspektiven. High Speed Cameras for Voice Diagnosis – Status Quo and New Perspectives. (In German). Sprache – Stimme – Gehör, 2005. 29(1): p. 29–34.

63. Manfredi, C., et al., Objective vocal fold vibration assessment from videokymographic images. Biomedical Signal Processing and Control, 2006. 1(2): p. 129–136.

64. Qiu, Q. and H.K. Schutte, A new generation videokymography for routine clinical vocal-fold examination. Laryngoscope, 2006. 116(10): p. 1824–1828.

65. Chung, D., et al., Upper displacement of the anterior commissure: experimental study of a new phonosurgical approach to raising vocal pitch. Ann. Otol. Rhinol. Laryngol, 2007. 116(6): p. 462–470.

66. Lohscheller, J., et al., Clinically evaluated procedure for the reconstruction of vocal fold vibrations from endoscopic digital high-speed videos. Med. Image Anal, 2007. 11(4): p. 400–413.

67. Mendelsohn, A.H., et al., Strobokymographic and videostroboscopic analysis of vocal fold motion in unilateral superior laryngeal nerve paralysis. Annals of Otology Rhinology and Laryngology, 2007. 116(2): p. 85–91.

68. Qiu, Q. and H.K. Schutte, Real-time kymographic imaging for visualizing human vocal-fold vibratory function. Review of Scientific Instruments, 2007. 78(2): p. Art. No. 024302.

69. Švec, J.G., F. Šram, and H.K. Schutte, Videokymography in voice disorders: What to look for? Annals of Otology Rhinology and Laryngology, 2007. 116(3): p. 172–180.

70. Bonilha, H.S. and D.D. Deliyski, Period and glottal width irregularities in vocally normal speakers. J. Voice, 2008. 22(6): p. 699–708.

71. Bonilha, H.S., D.D. Deliyski, and T.T. Gerlach, Phase asymmetries in normophonic speakers: visual judgments and objective findings. American Journal of Speech-Language Pathology, 2008. 17(4): p. 367–376.

72. Deliyski, D.D., et al., Clinical Implementation of Laryngeal High-Speed Videoendoscopy: Challenges and Evolution. Folia Phoniatr. Logop, 2008. 60(1): p. 33–44.

73. George, N.A., et al., Depth-kymography: high-speed calibrated 3D imaging of human vocal fold vibration dynamics. Physics in medicine and biology, 2008. 53(10): p. 2667–2675.

74. George, N.A., et al., New laryngoscope for quantitative high-speed imaging of human vocal folds vibration in the horizontal and vertical direction. Journal of Biomedical Optics, 2008. 13(6).

75. Jiang, J.J., et al., An automatic method to quantify mucosal waves via videokymography. Laryngoscope, 2008. 118(8): p. 1504–1510.

76. Mortensen, M. and P. Woo, High-speed imaging used to detect vocal fold paresis: A case report. Annals of Otology Rhinology and Laryngology, 2008. 117(9): p. 684–687.

77. Popolo, P.S. and I.R. Titze, Qualification of a quantitative laryngeal imaging system using videostroboscopy and videokymography. Annals of Otology Rhinology and Laryngology, 2008. 117(6): p. 404–412.

78. Shaw, H.S. and D.D. Deliyski, Mucosal wave: a normophonic study across visualization techniques. J. Voice, 2008. 22(1): p. 23–33.

79. Švec, J.G., J. Sundberg, and S. Hertegard, Three registers in an untrained female singer analyzed by videokymography, strobolaryngoscopy and sound spectrography. Journal of the Acoustical Society of America, 2008. 123(1): p. 347–353.

80. Švec, J.G., J. Sundberg, and S. Hertegard, Sound and video examples complementing the article „Three registers in an untrained female singer analyzed by videokymography, strobolaryngoscopy and sound spectrography”. NCVS Online Technical Memo, 2008. 10 version 1.1(January): p. 1–4.

81. Bless, D.M., R.R. Patel, and N. Connor, Laryngeal imaging: stroboscopy, high-speed imaging, and kymography, in The Larynx. Third Edition. Volume I, M.P. Fried and A. Ferlito, Editors. 2009, Plural Publishing: San Diego, CA. p. 181–210.

82. De Mul, F.F.M., et al., Depth-kymography of vocal fold vibrations: Part II. Simulations and direct comparisons with 3D profile measurements. Physics in Medicine and Biology, 2009. 54(13): p. 3955–3977.

83. Dedivitis, R.A., C.B. Sertorio, and E.G. Pfuetzenreiter, Videokymographic analysis of patients after frontolateral laryngectomy with sternohyoid muscle flap reconstruction. Acta Otorhinolaryngologica Italica, 2009. 29(3): p. 144–150.

84. Herbst, C.T., S. Ternström, and J.G. Švec, Investigation of four distinct glottal configurations in classical singing-A pilot study. Journal of the Acoustical Society of America, 2009. 125(3): p. EL104–EL109.

85. Howard, D.M., Acoustics of the trained versus untrained singing voice. Current Opinion in Otolaryngology & Head and Neck Surgery, 2009. 17(3): p. 155–159.

86. Kastner, J., et al., Videokymografie a digitální kymografie, kymografické nálezy u pacientů po thyreoidektomii. [Videokymography and digital kymography, kymographic findings in patients after thyroidectomy]. (In Czech). Endoskopie, 2009. 18(2): p. 64–66.

87. Larsson, H., Methods for measurement of vocal fold vibration and viscoelasticity. (Doctoral dissertation). 2009, Stockholm: Karolinska Institutet.

88. Moukalled, H.J., et al., Segmentation of laryngeal high-speed videoendoscopy in temporal domain using paired active contours, in Models and analysis of vocal emissions for biomedical applications: 6th International Workshop (MAVEBA 2009), C. Manfredi, Editor. 2009, Firenze University Press: Firenze Italy. p. 137–140.

89. Orlikoff, R.F., et al., Validation of a Glottographic Measure of Vocal Attack. Journal of Voice, 2009. 23(2): p. 164–168.

90. Pickup, B.A. and S.L. Thomson, Influence of asymmetric stiffness on the structural and aerodynamic response of synthetic vocal fold models. Journal of Biomechanics, 2009. 42(14): p. 2219–2225.

91. Švec, J.G., F. Šram, and H.K. Schutte, Videokymography, in The Larynx. Third Edition. Volume I, M.P. Fried and A. Ferlito, Editors. 2009, Plural Publishing: San Diego, CA. p. 253–274.

92. Verikas, A., et al., Advances in laryngeal imaging. European Archives of Oto-Rhino-Laryngology, 2009. 266(10): p. 1509–1520.

93. Zhang, Y., et al., Typing vocal fold vibratory patterns in excised larynx experiments via digital kymography. Annals of Otology Rhinology and Laryngology, 2009. 118(8): p. 598–605.

94. Deliyski, D., Laryngeal high-speed videoendoscopy, in Laryngeal evaluation: Indirect laryngoscopy to high-speed digital imaging, K.A. Kendall and R.J. Leonard, Editors. 2010, Thieme: New York. p. 245–270.

95. Deliyski, D.D. and R.E. Hillman, State of the art laryngeal imaging: research and clinical implications. Curr. Opin. Otolaryngol. Head Neck Surg, 2010. 18: p. 147–152.

96. Echternach, M., et al., High-speed imaging and electroglottography measurements of the open quotient in untrained male voices’ register transitions. Journal of Voice, 2010. 24(6): p. 644–650.

97. Kastner, J., et al., Surgical treatment of unilateral recurrent laryngeal nerve. [Chirurgická léčba jednostranné parézy zvratného nervu, In Czech). Endoskopie, 2010. 19(1): p. 21–27.

98. Kimura, M., et al., Arytenoid adduction for correcting vocal fold asymmetry: High-speed imaging. Annals of Otology Rhinology and Laryngology, 2010. 119(7): p. 439–446.

99. Mehta, D.D., et al., Voice production mechanisms following phonosurgical treatment of early glottic cancer. Annals of Otology Rhinology and Laryngology, 2010. 119(1): p. 1–9.

100. Regner, M.F., M.J. Robitaille, and J.J. Jiang, Interspecies comparison of mucosal wave properties using high-speed digital imaging. Laryngoscope, 2010. 120(6): p. 1188–1194.

101. Šram, F., J.G. Švec, and J. Vydrová, Včasná diagnostika poruch hlasu včetně rakoviny hlasivek. Lékarské listy, 2010. 3/2010: p. 9–12.

102. Herbst, C.T., et al., Membranous and cartilaginous vocal fold adduction in singing. Journal of the Acoustical Society of America, 2011. 129(4): p. 2253–2262.

103. Karajanagi, S.S., et al., Assessment of Canine Vocal Fold Function After Injection of a New Biomaterial Designed to Treat Phonatory Mucosal Scarring. Annals of Otology Rhinology and Laryngology, 2011. 120(3): p. 175–184.

104. Krausert, C.R., et al., Mucosal wave measurement and visualization techniques. Journal of Voice, 2011. 25(4): p. 395–405.

105. Krausert, C.R., et al., Quantitative study of vibrational symmetry of injured vocal folds via digital kymography in excised canine larynges. J. Speech Lang. Hear. Res, 2011. 54(4): p. 1022–1038.

106. Mehta, D.D., et al., Automated measurement of vocal fold vibratory asymmetry from high-speed videoendoscopy recordings. Journal of Speech Language and Hearing Research, 2011. 54(1): p. 47–54.

107. Švec, J., J. Dršata, and R. Holý, Optická vyšetrení, in Foniatrie – hlas, J. Dršata and a. kol., Editors. 2011, Tobiáš: Havlíčkův Brod. p. 64–73.

108. Švec, J.G. and F. Šram, Videokymographic examination of voice, in Handbook of Voice Assessments, E.P.-M. Ma and E.M.-L. Yiu, Editors. 2011, Plural Publishing: San Diego, CA. p. 129–146.

109. Witt, R.E., et al., Effects of surface dehydration on mucosal wave amplitude and frequency in excised canine larynges. Otolaryngol. Head Neck Surg, 2011. 144(1): p. 108–113.

110. Zanartu, M., et al., Observation and analysis of in vivo vocal fold tissue instabilities produced by nonlinear source-filter coupling: A case study. J. Acoust. Soc. Am, 2011. 129(1): p. 326–339.

111. Bonilha, H.S., et al., Vocal fold phase asymmetries in patients with voice disorders: A study across visualization techniques. Am. J. Speech Lang. Pathol, 2012. 21(1): p. 3–15.

112. Freeman, E., et al., A comparison of sung and spoken phonation onset gestures using high-speed digital imaging. J. Voice, 2012. 26(2): p. 226–238.

113. Hoffman, M.R., et al., Classification of glottic insufficiency and tension asymmetry using a multilayer perceptron. Laryngoscope, 2012. 122(12): p. 2773–2780.

114. Chodara, A.M., C.R. Krausert, and J.J. Jiang, Kymographic characterization of vibration in human vocal folds with nodules and polyps. Laryngoscope, 2012. 122(1): p. 58–65.

115. Kaneko, K., et al., Low-cost high-speed imaging system for observing vocal fold vibration in voice disorders. Journal for Oto-Rhino-Laryngology and its Related Specialties, 2012. 74: p. 208–210.

116. Kunduk, M., et al., Vocal fold vibratory behavior changes following surgical treatment of polyps investigated with high-speed video endoscopy and phonovibrography. Annals of Otology Rhinology and Laryngology, 2012. 121(6): p. 355–363.

117. Manfredi, C., et al., Videokymographic image processing: Objective parameters and user-friendly interface. Biomedical Signal Processing and Control, 2012. 7(2): p. 192–201.

118. Murray, P.R. and S.L. Thomson, Vibratory responses of synthetic, self-oscillating vocal fold models. J. Acoust. Soc. Am, 2012. 132(5): p. 3428–3438.

119. Piazza, C., et al., Quantitative analysis of videokymography in normal and pathological vocal folds: a preliminary study. European Archives of Oto-Rhino-Laryngology, 2012. 269(1): p. 207–212.

120. Szkielkowska, A., et al., The Videostrobokymography in phoniatric practice [Wideostrobokimografia w praktyce foniatrycznej]. Otolaryngologia Polska, 2012. 66(3): p. 214–218.

121. Švec, J.G. and H.K. Schutte, Kymographic imaging of laryngeal vibrations. Current Opinion in Otolaryngology & Head and Neck Surgery, 2012. 20(6): p. 458–465.

122. Zábrodský, M., et al., Zmeny ve VKG obrazu a objektivní hlasové analýze pri aplikaci minimálne invazivních technologií a NM v chirurgii štítné žlázy. [Changes of VKG Picture and Objective Voice Analysis in the Application of Minimal Invasive Technologies and NM in Thyroid Gland Surgery]. Otorinolaryngologie a foniatrie, 2012. 61(3): p. 148–161.

123. Alipour, F. and E. Finnegan, On the acoustic effects of the supraglottic structures in excised larynges. J. Acoust. Soc. Am, 2013. 133(5): p. 2984–2992.

124. Herbst, C.T., et al., Complex vibratory patterns in an elephant larynx. Journal of Experimental Biology, 2013. 216(21): p. 4054–4064.

125. Chhetri, D.K., et al., Effects of asymmetric superior laryngeal nerve stimulation on glottic posture, acoustics, vibration. Laryngoscope, 2013. 123(12): p. 3110–3116.

126. Krausert, C.R., et al., Effect of vocal fold injury location on vibratory parameters in excised canine larynges. Otolaryngol. Head Neck Surg, 2013. 148(1): p. 89–95.

127. Lohscheller, J., J.G. Švec, and M. Döllinger, Vocal-fold vibration amplitude, open quotient, speed quotient and their variability along glottal length: Kymographic data from normal subjects. Logopedics Phoniatrics Vocology, 2013. 38(4): p. 182–192.

128. Pimenta, R.A., et al., High-speed kymography identifies the immediate effects of voiced vibration in healthy vocal folds. International Archives of Otorhinolaryngology, 2013. 17(1): p. 74–79.

129. Pimenta, R.A., et al., Parameters acoustic and high-speed kymography identified effects of voiced vibration and vocal fry exercises. CoDAS, 2013. 25(6): p. 577–583.

130. Sulica, L., Laryngoscopy, stroboscopy and other tools for the evaluation of voice disorders. Otolaryngol. Clin. North Am, 2013. 46(1): p. 21–30.

131. Tokuda, I.T., et al., Reconstructing three-dimensional vocal fold movement via stereo matching. Acoustical Science and Technology, 2013. 34(5): p. 374–377.

132. Wang, S.-G., et al., Development of 2D scanning videokymography for analysis of vocal cord vibration. Journal of the Korean Society of Laryngology, Phoniatrics and Logopedics, 2013. 24: p. 107–111.

133. Baravieira, P.B., et al., Comparative analysis of vocal fold vibration using high-speed videoendoscopy and digital kymography. J. Voice, 2014. 28(5): p. 603–607.

134. Chen, W.L., P. Woo, and T. Murry, Spectral analysis of digital kymography in normal adult vocal fold vibration. Journal of Voice, 2014. 28(3): p. 356–361, DOI:10.1016/j.jvoice.2013.10.015.

135. Chhetri, D.K., J. Neubauer, and E. Sofer, Influence of asymmetric recurrent laryngeal nerve stimulation on vibration, acoustics, and aerodynamics. Laryngoscope, 2014. 124(11): p. 2544–2550.

136. Kosztyla-Hojna, B., et al., Visual assessment of voice disorders in patients with occupational dysphonia. Annals of Agricultural and Environmental Medicine, 2014. 21(4): p. 898–902.

137. Szkiełkowska, A., et al., Objectification of the severity of Reinke’s edema. Otolaryngologia Polska, 2014. 68(6): p. 287–292.

138. Woo, P., Objective measures of laryngeal imaging: What have we learned since Dr. Paul Moore. Journal of Voice, 2014. 28(1): p. 69–81.

139. Yamauchi, A., et al., Characteristics of vocal fold vibrations in vocally healthy subjects: Analysis with multi-line kymography. Journal of Speech Language and Hearing Research, 2014. 57(2): p. S648–S657.

140. Dejonckere, P.H., et al., Automated tracking of quantitative parameters from single line scanning of vocal folds: A case study of the ‘messa di voce’ exercise. Logopedics Phoniatrics Vocology, 2015. 40(1): p. 44–54.

141. Elemans, C.P.H., et al., Universal mechanisms of sound production and control in birds and mammals. Nature Communications, 2015. 6(27 Nov 2015): p. 1–13.

142. Chhetri, D.K. and J. Neubauer, Differential roles for the thyroarytenoid and lateral cricoarytenoid muscles in phonation. Laryngoscope, 2015. DOI: 10.1002/lary.25480.

143. Ling, C., et al., Bioengineered vocal fold mucosa for voice restoration. Science Translational Medicine, 2015. 7(314): p. 314ra187.

144. Mendelsohn, A.H., et al., Preliminary study of the open quotient in an ex vivo perfused human larynx. JAMA Otolaryngology – Head and Neck Surgery, 2015. 141(8): p. 751–756.

145. Novozámský, A., et al., Image analysis of videokymographic data, in IEEE International Conference on Image Processing (ICIP) 27-30 Sept. 2015, Quebec City, QC, Canada. 2015, IEEE. p. 78–82.

146. Shi, T., et al., Tracing vocal fold vibrations using level set segmentation method. International Journal for Numerical Methods in Biomedical Engineering, 2015. 31(6): p. Article number e02715.

147. Švec, J.G., From manual drawing of the vibratory pattern of the vocal folds to videokymographic imaging and further, in Normal and abnormal vocal folds kinematics. High-speed digital phonoscopy (HSDP), optical coherence tomography (OCT) & narrow band imaging (NBI®). Volume I: Technology, K. Izdebski, et al., Editors. 2015, Pacific Voice and Speech Foundation PVSF e-Q&A-b: San Francisco and Oakland, CA. p. 177–184.

148. Tibbetts, K.M. and M. Tan, Role of advanced laryngeal imaging in glottic cancer: Early detection and evaluation of glottic neoplasms. Otolaryngologic Clinics of North America, 2015. 48(4): p. 565–584.

149. Vydrová, J., J.G. Švec, and F. Šram, Videokymography (VKG) in laryngologic practice. Journal of MacroTrends in Health and Medicine, 2015. 3(1): p. 87–95.

150. Whitling, S., R. Rydell, and V. Lyberg-Ahlander, Design of a clinical vocal loading test with long-time measurement of voice. Journal of Voice, 2015. 29(2): p. 261.e13–261.e27.

151. Yamauchi, A., et al., Quantitative analysis of digital videokymography: A preliminary study on age- and gender-related difference of vocal fold vibration in normal speakers. Journal of Voice, 2015. 29(1): p. 109–119.

152. Yamauchi, A., et al., Vocal fold vibration in vocal fold atrophy: Quantitative analysis with high-speed digital imaging. Journal of Voice, 2015. 29(6): p. 755–762.

153. Zhang, Z., Regulation of glottal closure and airflow in a three-dimensional phonation model: Implications for vocal intensity control. Journal of the Acoustical Society of America, 2015. 137(2): p. 898–910.

154. Gao, X.-W., et al., Use Videostrobokymography to Quantitatively Analyze the Vibratory Characteristics Before and After Conservative Medical Treatment of Vocal Fold Leukoplakia. Journal of Voice, 2016. 30(2): p. 215–220.

155. Chen, W., P. Woo, and T. Murry, Vocal fold vibratory changes following surgical intervention. Journal of Voice, 2016. 30(2): p. 224–227.

156. Ikuma, T., et al., Synthetic multi-line kymographic analysis: A spatiotemporal data reduction technique for high-speed videoendoscopy. Journal of the Acoustical Society of America, 2016. 140(4): p. 2703–2713.

157. Patel, R.R., M.S. Harris, and S.L. Halum, Objective voice assessment, in Sataloff’s Comprehensive Textbook of Otolaryngology, Head & Neck Surgery. Vol.4. Laryngology, R.T. Sataloff and M.S. Benninger, Editors. 2016, Jaypee Brothers Medical Publishers: New Delhi, India. p. 155–167.

158. Vanhecke, F., et al., Physiology and acoustics of inspiratory phonation. Journal of Voice, 2016. 30(6): p. 769.e9 – 769.e18.

159. Wang, S.-G., et al., The first application of the two-dimensional scanning videokymography in excised canine larynx model. Journal of Voice, 2016. 30(1): p. 1–4.

160. Wang, S.G., et al., A new videokymography system for evaluation of the vibration pattern of entire vocal folds. Auris Nasus Larynx, 2016. doi: 10.1016/j.anl.2015.10.002.

161. Woo, P., Stroboscopy and High-Speed Video Examination of the Larynx, in Sataloff’s Comprehensive Textbook of Otolaryngology, Head & Neck Surgery. Vol.4. Laryngology, R.T. Sataloff and M.S. Benninger, Editors. 2016, Jaypee Brothers Medical Publishers: New Delhi, India. p. 193–234.

162. Yamauchi, A., et al., Quantitative analysis of vocal fold vibration in vocal fold paralysis with the use of high-speed digital imaging. Journal of Voice, 2016. 30(6): p. 766.e13–766.e22.

163. Yamauchi, A., et al., Quantification of vocal fold vibration in various laryngeal disorders using high-speed digital imaging. Journal of Voice, 2016. 30(2): p. 205–214.

164. Yamauchi, A., et al., Visualization and estimation of vibratory disturbance in vocal fold scar using high-speed digital imaging. Journal of Voice, 2016. 30(4): p. 493–500.

165. Yokonishi, H., et al., Relationship of various open quotients with acoustic property, phonation types, fundamental frequency, and intensity. Journal of Voice, 2016. 30(2): p. 145–157.

166. Aichinger, P., et al., Fundamental frequency tracking in diplophonic voices. Biomedical Signal Processing and Control, 2017. 37: p. 69–81.

167. Andrade-Miranda, G., N. Henrich Bernardoni, and J.I. Godino-Llorente, Synthesizing the motion of the vocal folds using optical flow based techniques. Biomedical Signal Processing and Control, 2017. 34: p. 25–35.

168. Dejonckere, P.H. and J. Lebacq, Damping of vocal fold oscillation at voice offset. Biomedical Signal Processing and Control, 2017.

169. Herbst, C.T., et al., Hemi-laryngeal setup for studying vocal fold vibration in three dimensions. Journal of Visualized Experiments, 2017. 2017(129): p. 1–9.

170. Herbst, C.T., et al., Freddie Mercury-acoustic analysis of speaking fundamental frequency, vibrato, and subharmonics. Logopedics Phoniatrics Vocology, 2017. 42(1): p. 29–38.

171. Herbst, C.T., et al., Comparing chalk with cheese—the EGG contact quotient is only a limited surrogate of the closed quotient. Journal of Voice, 2017. 31(4): p. 401–409.

172. Chen, W., P. Woo, and T. Murry, Vocal Fold Vibration Following Surgical Intervention in Three Vocal Pathologies: A Preliminary Study. Journal of Voice, 2017. 31(5): p. 610–614.

173. Ishikawa, C.C., et al., Impact of Cricothyroid Muscle Contraction on Vocal Fold Vibration: Experimental Study with High-Speed Videoendoscopy. Journal of Voice, 2017. 31(3): p. 300–306.

174. Jing, B.W., et al., Visualizing the movement of the contact between vocal folds during vibration by using array-based transmission ultrasonic glottography. Journal of the Acoustical Society of America, 2017. 141(5): p. 3312.

175. Kang, D.H., et al., Real-time Simultaneous DKG and 2D DKG Using High-speed Digital Camera. Journal of Voice, 2017. 31(2): p. 247.e1.

176. Kim, G.-H., et al., Real-time dual visualization of two different modalities for the evaluation of vocal fold vibration – Laryngeal videoendoscopy and 2D scanning videokymography: Preliminary report. Auris Nasus Larynx, 2017. 44(2): p. 174–181.

177. Krasnodebska, P., et al., Characteristics of Euphony in Direct and Indirect Mucosal Wave Imaging Techniques. Journal of Voice, 2017. 31(3): p. 383.e13–383.e18.

178. Patel, R.R., R. Walker, and M. Doellinger, Oscillatory Onset and Offset in Young Vocally Healthy Adults Across Various Measurement Methods. Journal of Voice, 2017. 31(4): p. Article Number: UNSP 512.e17.

179. Phadke, K.V., et al., Evaluation of clinical value of videokymography for diagnosis and treatment of voice disorders. European Archives of Oto-Rhino-Laryngology, 2017. 274(11): p. 3941–3949.

180. Shadi, M.S., et al., Videokymographic visualization of phonasthenia: A nonorganic voice disorder. Folia Phoniatrica et Logopaedica, 2017. 68(6): p. 252–260.

181. Tsutsumi, M., et al., High-speed Videolaryngoscopy: Quantitative Parameters of Glottal Area Waveforms and High-speed Kymography in Healthy Individuals. Journal of Voice, 2017. 31(3): p. 282–290.

182. Volgger, V., et al., Evaluation of the Combined use of Narrow Band Imaging and High-Speed Imaging to Discriminate Laryngeal Lesions. Lasers in Surgery and Medicine, 2017. 49(6): p. 609–618.

183. Woo, P., High-speed Imaging of Vocal Fold Vibration Onset Delay: Normal Versus Abnormal. Journal of Voice, 2017. 31(3): p. 307–312.

184. Woo, P. and P. Baxter, Flexible Fiber-Optic High-Speed Imaging of Vocal Fold Vibration: A Preliminary Report. Journal of Voice, 2017. 31(2): p. 175–181.

185. Yamauchi, A., et al., Characterization of vocal fold vibration in sulcus vocalis using high-speed digital imaging. Journal of Speech, Language, and Hearing Research, 2017. 60(1): p. 24–37.

186. Zhang, Y., et al., Quantifying the subharmonic mucosal wave in excised larynges via digital kymography. Journal of Voice, 2017. 31(1): p. Article Number: UNSP 123.e7.

187. Aichinger, P., et al., Tracking of multiple fundamental frequencies in diplophonic voices. IEEE/ACM Transactions on Audio, Speech, and Language Processing, 2018. 26(2): p. 330–341.

188. Krasnodȩbska, P., et al., Assessment of short-term functional voice therapy in patients with unilateral paralysis of the larynx. Otolaryngologia Polska, 2018. 72(2): p. 35–43.

189. Krasnodebska, P., W. Krasnodebski, and A. Szkiełkowska, Objectification of vocal folds mucosal wave. Otolaryngologia Polska, 2018. 72(5): p. 24–30.

190. Lulich, S.M., K.H. Berkson, and K. de Jong, Acquiring and visualizing 3D/4D ultrasound recordings of tongue motion. Journal of Phonetics, 2018. 71: p. 410–424.

191. Baken, R.J. and B.C. Watson, Research Note: Vocal Attack Time-Extended Analysis. J Voice, 2019. 33(3): p. 258–262.

192. Cavalli, L.J. and L.A. Cochrane, Surgical and therapeutic advances in the management of voice problems in children and young people. Current Opinion in Otolaryngology & Head and Neck Surgery, 2019. 27(3): p. 178–184.

193. Haubrich, R., F. Lefarth, and W. Angerstein, Morphological and functional examinations of the lips in brass musicians [Morphologische und funktionelle Untersuchungen der Mundlippen bei Blechbläsern 1]. Sprache Stimme Gehor, 2019. 43(1): p. 24–28.

194. Choi, S.H., et al., Phonatory Onset and Vibratory Characteristics Based on Phonatory Type Using 2D Kymography and High Speed Videolaryngoscopy in Normal Speakers. Communication Sciences and Disorders-Csd, 2019. 24(4): p. 1054–1065.

195. Kim, G.H., et al., Usefulness of Two-Dimensional Digital Kymography in Patients With Vocal Fold Scarring. Journal of Voice, 2019. 33(6): p. 906–914.

196. Kim, I.G., et al., Regeneration of Paralyzed Vocal Fold by the Injection of Plasmid DNA Complex-Loaded Hydrogel Bulking Agent. ACS Biomaterials Science and Engineering, 2019. DOI: 10.1021/acsbiomaterials.8b01541.

197. Kumar, S.P. and J.G. Švec, Kinematic model for simulating mucosal wave phenomena on vocal folds. Biomedical Signal Processing and Control, 2019. 49(March): p. 328–337.

198. Lebacq, J. and P.H. Dejonckere, The dynamics of vocal onset. Biomedical Signal Processing and Control, 2019. 49(March): p. 528–539.

199. Lee, J.-C., et al., Clinical Practicability of a Newly Developed Real-time Digital Kymographic System. Journal of Voice, 2019. 33(3): p. 346–351.

200. Migimatsu, K. and I.T. Tokuda, Experimental study on nonlinear source-filter interaction using synthetic vocal fold models. Journal of the Acoustical Society of America, 2019. 146(2): p. 983–997.

201. Schutte, H.K., Historical Approaches in Revealing the Singing Voice, Part 1, in Oxford handbook of singing, G. Welch, D.M. Howard, and J. Nix, Editors. 2019, Oxford University Press: Oxford, UK. p. 965–990.

202. Švec, J.G., Základní a aplikovaný výzkum tvorby lidského hlasu. Habilitační práce. [Basic and Applied Research on Human Voice Production. Habilitation Thesis]. 2019, Olomouc: Přírodovědecká fakulta, Univerzita Palackého v Olomouci.

203. Angerstein, W., et al., Diagnosis and Differential Diagnosis of Voice Disorders, in European Manual of Medicine: Phoniatrics 1, A. am Zehnhoff-Dinnesen, et al., Editors. 2020, Springer Verlag: Berlin, Heidelberg, Germany. p. 349–430.

204. Gandhi, S., et al., High-speed videolaryngoscopy in early glottic carcinoma patients following transoral CO2 LASER cordectomy. European Archives of Oto-Rhino-Laryngology, 2020.

205. Haubrich, R. and W. Angerstein, Stroboscopic and Kymographic Examinations of Lip Vibrations in Brass Musicians, in European Manual of Medicine: Phoniatrics 1, A. am Zehnhoff-Dinnesen, et al., Editors. 2020, Springer Verlag: Berlin Heidelberg. p. 387–396.

206. Chen, W., P. Woo, and T. Murry, Vibratory Onset of Adductor Spasmodic Dysphonia and Muscle Tension Dysphonia: A High-Speed Video Study. Journal of Voice, 2020. 34(4): p. 598–603.

207. Kumar, S.P., et al., Visual and automatic evaluation of vocal fold mucosal waves through sharpness of lateral peaks in high-speed videokymographic images. Journal of Voice, 2020. 34(2): p. 170–178.

208. Patel, R.R. and J.G. Švec. Laryngeal Imaging. Journal of Voice Source Readings 2020; Available from: https://www.jvoice.org/content/ymvj-laryngeal-imaging.

209. Powell, M.E.G., et al., Efficacy of Videostroboscopy and High-Speed Videoendoscopy to Obtain Functional Outcomes From Perioperative Ratings in Patients With Vocal Fold Mass Lesions. Journal of Voice, 2020. 34(5): p. 769–782.

210. Šram, F., J.G. Švec, and J. Vydrová, Videokymography, in European Manual of Medicine: Phoniatrics 1, A. am Zehnhoff-Dinnesen, et al., Editors. 2020, Springer Verlag: Berlin Heidelberg. p. 379–387.

211. Woo, P., Objective Measures of Stroboscopy and High-Speed Video. Advances in Oto-Rhino-Laryngology, 2020. 85: p. 25–44.

212. Bae, I.H. and H.J. Park, Automated quantitative analysis of vocal fold vibration using two-dimensional scanning videokymography after transoral laser microsurgery. Clinical Archives of Communication Disorders, 2021. 6(1): p. 39–47.

213. Blahayil, S., D.R. Gunjawate, and R.K. Balasubramanium, Kymographic Characteristics of Voice in Women with Polycystic Ovary Syndrome. CODAS, 2021. 33(5): p. 1–7.

214. Bouvet, A., et al., Imaging of auto-oscillating vocal folds replicas with left–right level difference due to angular asymmetry. Biomedical Signal Processing and Control, 2021. 63.

215. Bulusu, S., et al., Fitting synthetic to clinical kymographic images for deriving kinematic vocal fold parameters: Application to left-right vibratory phase differences. Biomedical Signal Processing and Control, 2021. 63: p. Art. no. 102253.

216. Kim, J.S., et al., Vocal Fold Vibration Characteristics during SOVTE using a Vibration Simulator and Digital Kymography. Communication Sciences and Disorders, 2021. 26(4): p. 921–932.

217. Motie-Shirazi, M., et al., Vocal fold dynamics in a synthetic self-oscillating model: Intraglottal aerodynamic pressure and energy. Journal of the Acoustical Society of America, 2021. 150(2): p. 1332–1345.

218. Sharma, G.K., et al., Surface kinematic and depth-resolved analysis of human vocal folds in vivo during phonation using optical coherence tomography. Journal of Biomedical Optics, 2021. 26(8).

219. Stewart, M.E. and B.D. Erath, Investigating blunt force trauma to the larynx: The role of inferior-superior vocal fold displacement on phonation. Journal of Biomechanics, 2021. 121.

220. Yamauchi, A., et al., Multivariate analysis of vocal fold vibrations on various voice disorders using high‐speed digital imaging. Applied Sciences (Switzerland), 2021. 11(14).

221. Aichinger, P., et al., Simulated Laryngeal High-Speed Videos for the Study of Normal and Dysphonic Vocal Fold Vibration. Journal of Speech Language and Hearing Research, 2022. 65(7): p. 2431 – 2445.

222. DeJonckere, P.H. and J. Lebacq, Vocal Fold Collision Speed in vivo: The Effect of Loudness. Journal of Voice, 2022. 36(5): p. 608–621.

223. Miyamoto, M., et al., Excised human larynx in N-vinyl-2-pyrrolidone-embalmed cadavers can produce voiced sound by pliable vocal fold vibration. Anatomical Science International, 2022.

224. Mohd Khairuddin, K.A., et al., Effects of Using Laryngeal High-Speed Videoendoscopy Images Visualizing Partial Views of The Glottis on Measurement Outcomes. Journal of Voice, 2022. 36(1): p. 106–112.

225. Saindani, S., et al., A Prospective Observational Study to Determine the Added Clinical Value of Videokymography to Videostroboscopy in Patients with Change in Voice. Indian Journal of Otolaryngology and Head & Neck Surgery, 2022.

226. Zita, A., et al., Videokymogram Analyzer Tool: Human-computer comparison. Biomedical Signal Processing and Control, 2022. 78(3): p. Article number 103878, pp. 01–12.

227. de Deus, A.B., et al., Videokymographic index of glottic function: an analysis of diagnostic accuracy. CODAS, 2023. 35(1).

228. Kim, K.H., et al., Evaluation of Voice and Vocal Fold Vibration after Thyroidectomy Using Two-Dimensional Scanning Digital Kymography and High-Speed Videolaryngoscopy. Journal of Voice, 2023. 37(3): p. 471.e15–471.e22.

229. Kumar, S.P., et al., Convolutional neural network for voice disorders classification using kymograms. Biomedical Signal Processing and Control, 2023. 86: p. Art. no. 105159.

230. Luizard, P., et al., Flow-induced oscillations of vocal-fold replicas with tuned extensibility and material properties. Scientific Reports, 2023. 13(1).

231. Madsen, P.T., U. Siebert, and C.P.H. Elemans, Toothed whales use distinct vocal registers for echolocation and communication. Science, 2023. 379(6635): p. 928–993.

232. Malinowski, J., et al., High-Speed Videoendoscopy Enhances the Objective Assessment of Glottic Organic Lesions: A Case-Control Study with Multivariable Data-Mining Model Development. Cancers, 2023. 15(14).

233. Xu, X., et al., Vocal Vibration Opening Onset Position Abnormality in Patients With Adductor Spasmodic Dystonia by Using High-Speed Endoscopy. Journal of Voice, 2023.

234. DeJonckere, P.H. and J. Lebacq, The Physics of the Human VocalFolds as a Biological Oscillator, in New Insights on Oscillators and Their Applications to Engineering and Science, J.M. Balthazar and A.M. Tusset, Editors. 2024, IntechOpen, Ltd.: London, UK.

235. Echternach, M., et al., Biomechanics of sound production in high-pitched classical singing. Scientific Reports, 2024. 14(1).

236. Hasegawa, H., et al., Experimental Study on Inspiratory Phonation Using Physical Model of the Vocal Folds. Journal of Voice, 2024. 38(4): p. 826–835.

237. Inoue, T., et al., Nonlinear dynamics and chaos in a vocal-ventricular fold system. Chaos, 2024. 34(2): p. 023134.

238. Malinowski, J., et al., Value of high-speed videoendoscopy as an auxiliary tool in differentiation of benign and malignant unilateral vocal lesions. Journal of Cancer Research and Clinical Oncology, 2024. 150(1).

239. Matsumoto, T., et al., Synchronized and Desynchronized Dynamics Observed from Physical Models of the Vocal and Ventricular Folds: Synchronized and Desynchronized Dynamics of the Vocal and Ventricular Folds. Journal of Voice, 2024. 38(3): p. 572–584.

240. Nakamura, K., et al., Twin vocal folds as a novel evolutionary adaptation for vocal communications in lemurs. Scientific Reports, 2024. 14(1).

241. Nogueira do Nascimento, U., M.A.R. Santos, and A.C.C. Gama, Digital Videokymography: Analysis of Glottal Closure in Adults. Journal of Voice, 2024. 38(1): p. 18–24.

242. Panchami, B., S.P. Kumar, and K.V. Phadke, Visualization and Analysis of Vocal Fold Dynamics in Various Voice Disorders. Journal of Voice, 2024.

243. Plec, E.M.R.L., et al., Effect of Nebulization on Laryngeal Parameters: Analysis Using High-Speed Digital Videolaryngoscopy. Journal of Voice, 2024. 38(4).

244. Woo, P., Simultaneous High-Speed Video Laryngoscopy and Acoustic Aerodynamic Recordings during Vocal Onset of Variable Sound Pressure Level: A Preliminary Study. Bioengineering, 2024. 11(4).

245. Yamauchi, A., et al., Multivariate Analysis of Vocal Fold Vibrations in Normal Speakers Using High-Speed Digital Imaging. Journal of Voice, 2024. 38(1): p. 10–17.

246. Awad, A., et al., Modeling and simulation of different vocal fold vibration patterns related to hyperfunctional dysphonic symptoms. Applied Acoustics, 2025. 240.

247. Cruz, D.R.D., et al., Vocal Fold Scar Treatment via Controlled Dexamethasone Delivery With a Light-Activatable Implant. Laryngoscope, 2025.

248. DeJonckere, P.H. and J. Lebacq, Biophysics of Voice Onset: A Comprehensive Overview. Bioengineering, 2025. 12(2): p. 155.

249. Farbos de Luzan, C., et al., Dynamically Quantifying Vocal Fold Thickness: Effects of Medialization Implant Location on Glottal Shape and Phonation. Bioengineering, 2025. 12(6).

250. Nogueira do Nascimento, U., M.A.R. Santos, and A.C.C. Gama, Analysis of the Immediate Effects of the LaxVox Technique on Digital Videokymography Parameters in Adults With Voice Complaints. Journal of Voice, 2025. 39(3): p. 736–743.

251. Pietrzak, M.M., et al., Assessment of the Interdependencies Between High-Speed Videoendoscopy and Simultaneously Recorded Audio Data in Various Glottal Pathologies. BIOMEDICINES, 2025. 13(2).

252. Švec, J.G., et al., Vocal Fold Kinematics and Convergent-Divergent Oscillatory Glottis: Basic Insights Using Mucosal Wave Modelling and Synthetic Kymograms. Journal of Speech Language and Hearing Research, 2025. 68(4): p. 1602–1617.

253. Valášková, D., et al., Unilateral vocal fold paralysis: Does the paralyzed vocal fold oscillate slower or faster than the healthy one? Journal of Voice, 2025.

254. Venkata Murali, S.R., et al., Videostrobokymographic Analysis of Stroboscopic Footage With Unsteady Laryngeal Positions From Phononormals. Journal of Voice, 2025.

255. Lim, D.W., et al., Clinical Efficacy of Synchronized Voice Playback in Evaluation of Dysphonia Using Digital Kymography. Korean Journal of Otorhinolaryngology-Head and Neck Surgery, 2026. 69(1): p. 38–45.