Undertone singing is a set of singing techniques in which the vocalist makes use of vibrations of the vocal apparatus[1] in order to produce subharmonic tones below the bass tone and extend the vocal range below the limits of the modal voice.[2] In particular, the sound is produced via constricting the larynx in order to produce oscillations in the vocal cords and vestibular folds (or "false vocal cords") at certain frequencies of the vocal cords - corresponding to integer divisions of the frequency produced by the vestibular folds, such as 1:2, 1:3, and 1:4 ratios.[1] This will produce the corresponding subharmonic to that frequency. For example, in a 1:2 ratio, each second vibration of the vocal folds, the vestibular fold will complete a single vibration cycle which will result in an subharmonic produced an octave below the bass tone produced by the vocal cords. This technique is found in certain Tibetan forms of Buddhist Chant, as practised by monks of the Gyuto Order,[3] as well as in Mongolian throat singing,[4] where it is often used in conjunction with other vocal techniques, such as vocal fry. The technique produces a deep, growling quality.
References
edit- ^ a b Švec, Jan G.; Schutte, Harm K.; Miller, Donald G. (1996-02-01). "A Subharmonic Vibratory Pattern in Normal Vocal Folds". Journal of Speech, Language, and Hearing Research. 39 (1): 135–143. doi:10.1044/jshr.3901.135. PMID 8820705.
- ^ "Undertone Singing". I love overtone singing - Wolfgang Saus. Retrieved 2022-05-30.
- ^ Smith, Huston; Stevens, Kenneth N.; Tomlinson, Raymond S. (1967-02-01). "On an Unusual Mode of Chanting by Certain Tibetan Lamas". The Journal of the Acoustical Society of America. 41 (5): 1262–1264. Bibcode:1967ASAJ...41.1262S. doi:10.1121/1.1910466. ISSN 0001-4966.
- ^ Lindestad, P. A.; Södersten, M.; Merker, B.; Granqvist, S. (2001-03-15). "Voice source characteristics in Mongolian "throat singing" studied with high-speed imaging technique, acoustic spectra, and inverse filtering". Journal of Voice. 15 (1): 78–85. doi:10.1016/S0892-1997(01)00008-X. ISSN 0892-1997. PMID 12269637.
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