Glottal stops may also be realized entirely as creaky voice instead of single glottal closure.
While the latter generally consists of creaky phonation, there is some allophony involved.
In some dialects the creaky tone is higher than mid tone, in others they are equal.
Approximately speaking, the voiced allotones were pronounced with additional breathy voice or creaky voice and with lowered pitch.
Similarly, creaky vowels tend to confine their creakiness to the first part of the vowel, often with glottal closure before modal voice: as or.
They run in spurts on the ground but take to flight with a hoarse creaky "gwaat" call.
Glottalization of vowels and other sonorants is most often realized as creaky voice (partial closure).
Laryngealization generally consists of glottalization of the vowel in question, creating a kind of creaky voice.
