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The space between the
Vocal Cords is called the .
As the vocal cords vibrate, the resulting vibration produces a "buzzing" quality to the speech, called or '''voicing'''.
Sound production involving only the glottis is called ''glottal''. English has a
Voiceless Glottal Fricative 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 (and in some dialects, occasionally of and ); in some languages, this sound is a
Phoneme of its own.
Skilled players of the Australian
Didgeridoo restrict their glottal opening in order to produce the full range of timbres available on the instrument.
See "Acoustics: The vocal tract and the sound of a didgeridoo", by Tarnopolsky et al. in Nature 436, 39 (
7 July 2005 ))
The vibration produced is an essential component of ''voiced''
Consonant s as well as
Vowel s. If the vocal folds are drawn apart, air flows between them causing no vibration, as in the production of voiceless consonants.
- Voiced consonants include
- Voiceless consonants include
