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Arytenoid cartilage.png
Arytenoid cartilage
Glottis positions.png
Glottis positions
MeSH Glottis
Anatomical terminology

The glottis is defined as the vocal folds and the opening between them (the rima glottidis).[1]


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.[citation needed] 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.[citation needed]

Skilled players of the Australian didgeridoo restrict their glottal opening in order to produce the full range of timbres available on the instrument.[2]

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.[citation needed]

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/.

Additional images[edit]

The entrance to the larynx, viewed from behind. 
The entrance to the larynx. 
Larynx, pharynx and tongue. Deep dissection.Posterior view. 
Larynx, pharynx and tongue. Deep dissection.Posterior view. 
Larynx, pharynx and tongue. Deep dissection.Posterior view. 

See also[edit]


  1. ^ Glottis at eMedicine Dictionary
  2. ^ See "Acoustics: The vocal tract and the sound of a didgeridoo", by Tarnopolsky et al. in Nature 436, 39 (7 July 2005))

References of Glottis Simulator[edit]

  • de Menezes Lyra R. Glottis simulator. Anesth Analg. 1999 Jun;88(6):1422-3.[1]
  • Smith, N Ty. Simulation in anesthesia: the merits of large simulators versus small simulators. Current Opinion in Anaesthesiology. 13(6):659-665, December 2000.

External links[edit]