R: References

[1] E. Joliveau, J. Smith, and J. Wolfe, “Vocal tract resonances in singing: The soprano voice,” J. Acoust. Soc. Am., vol. 116, no. 4, pp. 2434–2439, 2004.

[2] J. Sundberg, “Perception of Singing,” in The Psychology of Music, 3rd ed. London: Academic Press, pp. 69–106, 2012.

[3] L. A. Smith and B. L. Scott, “Increasing the intelligibility of sung vowels,” J. Acoust. Soc. Am., vol. 67, no. 5, pp. 1795–1797, 1980.

[4] D. Maurer and T. Landis, “F0-dependence, number alteration, and non-systematic behaviour of the formants in German vowels.,” Int. J. Neurosci., vol. 83, pp. 25–44, 1995.

[5] D. Maurer, C. D’Heureuse, and T. Landis, “Formant pattern ambiguity of vowel sounds,” Int. J. Neurosci., vol. 100, pp. 39–76, Jan., 2000.

[6] E. Zee, “Frequency analysis of the vowels in Cantonese from 50 male and 50 female speakers,” Proceedings of the 15th ICPhS, pp. 1117-1120, 2003.

[7] W.-S. Lee, “Vowel formant frequency characteristics of adult and preadolescent males and females,” Chinese Journal of Phonetics, vol. 2, pp. 90-97, 2009.

[8] P. Boersma, “Praat, a system for doing phonetics by computer,” Glot International, vol. 5, pp. 341-345.

[9] 龍情詩意半世紀, 龍劍笙 : 梅雪詩