Here are glottal consonants in the International Phonetic Alphabet:
In many languages, the "fricatives" are not true fricatives. This is a historical usage of the word. They instead represent transitional states of the glottis (phonation) without a specific place of articulation, and may behave as approximants. is a voiceless transition. is a breathy-voiced transition, and could be transcribed as .
The glottal stop occurs in many languages. Often all vocalic onsets are preceded by a glottal stop, for example in German (in careful pronunciation; often omitted in practice). The Hawaiian language writes the glottal stop as the ‘okina ‘, which resembles a single open quotation mark. Some alphabets use diacritics for the glottal stop, such as hamza ⟨ء⟩ in the Arabic alphabet; in many languages of Mesoamerica, the Latin letter ⟨h⟩ is used for glottal stop, while in Maltese, the letter ⟨q⟩ is used.
Because the glottis is necessarily closed for the glottal stop, it cannot be voiced. So-called voiced glottal stops are not full stops, but rather creaky voiced glottal approximants that may be transcribed . They occur as the intervocalic allophone of glottal stop in many languages. Gimi contrasts /ʔ/ and /ʔ̞/, corresponding to /k/ and /ɡ/ in related languages.
Paired vowels are: unrounded • rounded