1. Verdolini K, Titze IR, Fennell A. Dependence of phonatory effort on hydration level. J Speech Hear Res. 1994;37(5):1001–7.
  2. Verdolini-Marston K, Titze IR, Druker DG. Changes in phonation threshold pressure with induced conditions of hydration. J Voice [Internet]. 1990 Jan [cited 2015 Dec 16];4(2):142–51. Available from:
  3. Leydon C, Sivasankar M, Falciglia DL, Atkins C, Fisher K V. Vocal Fold Surface Hydration: A Review. J Voice [Internet]. 2009;23(6):658–65. Available from:
  4. Finkelhor BK, Titze IR, Durham PL. The effect of viscosity changes in the vocal folds on the range of oscillation. J Voice. 1988;1(4):320–5.
  5. Hirano M. Phonosurgery: basic and clinical investigations. Otol. 1975;21:239–42.
  6. Verdolini-Marston K, Sandage M, Titze IR. Effect of hydration treatments on laryngeal nodules and polyps and related voice measures. J Voice. 1994;8(1):30–
  7. Chan RW, Tayama N. Biomechanical effects of hydration in vocal fold tissues. Otolaryngol – Head Neck Surg. 2002;126(5):528–37.
  8. Chan RW, Titze IR. Viscoelastic shear properties of human vocal fold mucosa: Measurement methodology and empirical results. J Acoust Soc Am. 1999;106(4):2008–21.
  9. Gray SD, Titze IR, Chan R, Hammond TH. Vocal fold proteoglycans and their influence on biomechanics. Laryngoscope. 1999;109(6):845–54.
  10. Verdolini K, Min Y, Titze IR, Lemke J, Brown K, Van Mersbergen M, et al. Biological mechanisms underlying voice changes due to dehydration. J Speech, Lang Hear Res. 2002;45(2):268–81.
  11. Kumar SP, Švec JG. Kinematic model for simulating mucosal wave phenomena on vocal folds. Biomed Signal Process Control. 2019;49:328–37.
  12. Gerratt BR, Hanson DG, Berke GS, Precoda K. Photoglottography: A clinical synopsis. J Voice. 1991;5(2):98–105.
  13. Krausert CR, Olszewski AE, Taylor LN, McMurray JS, Dailey SH, Jiang JJ. Mucosal wave measurement and visualization techniques. J Voice [Internet]. 2011;25(4):395–405. Available from:
  14. Leydon C, Wroblewski M, Eichorn N, Sivasankar M. A meta-analysis of outcomes of hydration intervention on phonation threshold pressure. J Voice [Internet]. 2010;24(6):637–43. Available from:
  15. Sivasankar M, Leydon C. The role of hydration in vocal fold physiology. Curr Opin Otolaryngol Head Neck Surg. 2010;18(3):171–5.
  16. Franca MC, Simpson KO. Effects of systemic hydration on vocal acoustics of 18- to 35-year-old females. Commun Disord Q. 2012;34(1):29–37.
  17. Alves M. The effect of hydration on voice quality in adults: a systemic review. J Voice. 2019;33(1):125-e13.
  18. Titze IR. Vocal efficiency. J Voice. 1992;6(2):135–8.
  19. Jéquier E, Constant F. Water as an essential nutrient: The physiological basis of hydration. Eur J Clin Nutr. 2010;64(2):115–23.
  20. Magee E. Tell Me what to Eat If I Have Acid Reflux: Nutrition You Can Live with. Weiser: Red Wheel; 2008.
  21. Alford RH, Kasel JA, Gerone PJ, Knight V. uman influenza resulting from aerosol inhalation. Proc Soc Exp Biol Med. 1966;122(3):800–4.
  22. Wells WF. On air-borne infection: study II. Droplets and droplet nuclei. Am J Epidemiol. 1934;20(3):611–8.
  23. Qi A, Friend JR, Yeo LY, Morton DAV, McIntosh MP, Spiccia L. Miniature inhalation therapy platform using surface acoustic wave microfluidic atomization. Lab Chip. 2009;9(15):2184–93.
  24. Kooij S, Astefanei A, Corthals GL, Bonn D. Size distributions of droplets produced by ultrasonic nebulizers. Sci Rep. 2019;9(1):1–9.
  25. Wells WF. Airborne Contagion and Air Hygiene. An Ecological Study of Droplet Infections. Airborne Contagion and Air Hygiene. An Ecological Study of Droplet Infections. 1955.
  26. Borragan Torre A, Salcines Correa MJ. Importancia del diagnóstico temprano para la correcta orientación del futuro profesional de la voz. In: XIV Congreso Nacional de la S E ORL. Santander, Spain; 1990. p. 17–20.
  27. Borragan Torre A. Il metodo Propriocettivo Elastico nel trattamento delle disfonie. In: La voce, Corso di formazione e aggiornamento. Padova, italy; 1996. p. 16–8.
  28. Borragan Torre A, Agudo Leguina M, Ferandez Gonzalez MJ, Salcines Correa MJ, Villanueva B. El método Propioceptivo- Elástico en la rehabilitación de los trastornos de la voz. In: XXI Congreso Internacional de AELFA. La Coruña; 2000.
  29. Borragán Torre A, Agudo Leguina M, Fernández González MJ, Gómez Mediavilla B, Borragán M. Método propioceptivo Elástico (PROEL) para el tratamiento de los trastornos de la voz. Las bases de la terapia vocal (1/5). Santander, Spain: CFL training Ed.; 2017
  30. Law RM, Ngo MA, Maibach HI. Twenty clinically pertinent factors/observations for percutaneous absorption in humans. Am J Clin Dermatol. 2020;21(1):85–95.
  31. Phuong C, Maibach HI. Effect of massage on percutaneous penetration and skin decontamination: man and animal. Cutan Ocul Toxicol. 2016;35(2):153–6.
  32. Bhattacharyya N. The prevalence of voice problems among adults in the United States. Laryngoscope. 124(10):2359-2362.
  33. Roy N, Merrill RM, Gray SD, Smith EM. Voice disorders in the general population: Prevalence, risk factors, and occupational impact. Laryngoscope. 2005;115(11):1988–95.
  34. Núñez-Batalla F, Corte-Santos P, Señaris-González B, Llorente-Pendás JL, Górriz-Gil C, Suárez-Nieto C. Adaptación y validación del índice de incapacidad vocal (VHI-30) y su versión abreviada (VHI-10) al español. Acta Otorrinolaringol Esp. 2007;58(9):386–92.
  35. KARL STORZ SE & Co. KG. Karl Storz telelaryngoscope. Tuttlingen, Germany;
  36. Adobe Incorporated. Adobe Premiere Pro 2.0. San Jose, California;
  37. Cornut G, Bouchayer M. Apport de la vidéostroboscopie dans les indications de phonochirurgie. In: Acta Otorhinolaryngol Belg. 1986. p. 40:436–442.
  38. Hirano M, McCormick KR. Clinical Examination of Voice by Minoru Hirano . J Acoust Soc Am. 1986;80(4):1273–1273.
  39. Ricci-Maccarini A, Bergamini G, Fustos R. Proposal of a form for the collection of videolaryngostroboscopy basic findings. Eur Arch Oto-Rhino-Laryngology [Internet]. 2018;275(7):1927–33. Available from:
  40. Kendall KA. High-speed laryngeal imaging compared with videostroboscopy in healthy subjects. Arch Otolaryngol – Head Neck Surg. 2009;135(3):274–81.
  41. Hirano M. Psycho-acoustic evaluation of voice: GRBAS scale for evaluating the hoarse voice. Clin Exam Voice. 1981;
  42. Isshiki N, Okamura H, Tanabe M, Morimoto M. Differential diagnosis of hoarseness. Folia Phoniatr (Basel). 1969;21(1):9–19.
  43. Elemetrics K. Multi-Dimensional Voice Program (MDVP). Pine Brook; 1993.
  44. Gish A, Kunduk M, Sims L, McWhorter AJ. Vocal warm-up practices and perceptions in vocalists: a pilot survey. J Voice. 2012;26(1).
  45. Mezzedimi C, Spinosi MC, Massaro T, Ferretti F, Cambi J. Singing voice: acoustic parameters after vocal warm-up and cool-down, Logopedics Phoniatrics
    Vocology. Chiara Mezzedimi, Maria Carla Spinosi, Tommaso Massaro, Fabio
    Ferretti & Jacopo Cambi. 2018;
  46. Benjamin L. Lecturing. In: Davis SF, Buskist W, editors. The Teaching of Psychology: Essays in Honor. NJ: Lawrence: Mahwah; 2002. p. 57– 67.
  47. McKeachien WJ. Teaching Tips: Strategies, Research and Theory for College and
    University . Teachers. Lexington, MA:; 1986.
  48. Altman DG. Practical Statistics for Medical Research. 7th ed. London:
    Chapman&Hall; 1996.
  49. Wykes T, Hayward P, Thomas N, Green N, Surguladze S, Fannon D, et al. What are the effects of group cognitive behaviour therapy for voices? A randomised Control trial Schizophr Res. 2005;77(2–3):201-210.
  50. Fillmore LW. When learning a second language means losing the first. Early Child Res Q. 1991;6(3):323–46.
  51. Sivasankar M, Fisher K V. Oral breathing increases Pth and vocal effort by superficial drying of vocal fold mucosa. J Voice. 2002;16(2):172–81.
  52. Ghersetich I, Lotti T, Campanile G, Grappone C, Dini G. Hyaluronic acid in cutaneous intrinsic aging. Int J Dermatol. 1994;33(2):119-122.
  53. Xu H. The coupling effect of water and GAGs on the in situ toughness of bone