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As the vocal folds vibrate, the resulting vibration produces a "buzzing" quality to the speech, called voice or voicing or pronunciation.
Sound production involving only the glottis is called glottal. English has a voiceless glottal transition spelled "h". In many accents of English the glottal stop (made by pressing the folds together) is used as a variant allophone of the phoneme /t/ (and in some dialects, occasionally of /k/ and /p/); in some languages, this sound is a phoneme of its own.
The vibration produced is an essential component of voiced consonants as well as vowels. If the vocal folds are drawn apart, air flows between them causing no vibration, as in the production of voiceless consonants.
The glottis is also important in the valsalva maneuver.
- Voiced consonants include /v/, /z/, /ʒ/, /d͡ʒ/, /ð/, /b/, /d/, /ɡ/, /w/.
- Voiceless consonants include /f/, /s/, /ʃ/, /t͡ʃ/, /θ/, /p/, /t/, /k/, /ʍ/, and /h/.
- Ladefoged, Peter. 2006. A course in Phonetics. UCLA.
- WebMD (2009). "glottis". Webster's New World Medical Dictionary (3rd ed.). Houghton Mifflin Harcourt. p. 178. ISBN 978-0-544-18897-6.
- Tarnopolsky, Alex; Fletcher, Neville; Hollenberg, Lloyd; Lange, Benjamin; Smith, John; Wolfe, Joe (2005). "Acoustics: The vocal tract and the sound of a didgeridoo". Nature 436 (7047): 39. Bibcode:2005Natur.436...39T. doi:10.1038/43639a. PMID 16001056.
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