Editing Articulatory phonetics (section)

==== Glottal consonants ====
{{Main|Glottal consonant}}
Glottal consonants are those produced using the vocal folds in the larynx. Because the vocal folds are the source of phonation and below the oro-nasal vocal tract, a number of glottal consonants are impossible such as a voiced glottal stop. Three glottal consonants are possible, a voiceless glottal stop and two glottal fricatives, and all are attested in natural languages.{{sfn|International Phonetic Association|2015}}

[[Glottal stop]]s, produced by closing the [[Vocal cords|vocal folds]], are notably common in the world's languages.{{Sfn|Ladefoged|Maddieson|1996|p=38}} While many languages use them to demarcate phrase boundaries, some languages like [[Huautla Mazatec|Huatla Mazatec]] have them as contrastive phonemes. Additionally, glottal stops can be realized as [[laryngealization]] of the following vowel in this language.{{Sfn|Ladefoged|Maddieson|1996|p=74}} Glottal stops, especially between vowels, do usually not form a complete closure. True glottal stops normally occur only when they are [[Gemination|geminated]].{{Sfn|Ladefoged|Maddieson|1996|p=75}}