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Labial–velar consonant
Labial–velar consonants are doubly articulated at the velum and the lips, such as . They are sometimes called "labiovelar consonants", a term that can also refer to labialized velars, such as and the approximant .
==Doubly articulated labial-velars==
Truly doubly articulated labial–velars occur as stops and nasals in the majority of languages in West and Central Africa (for example in the name of Laurent Gbagbo, former president of Ivory Coast; they are found in many Niger–Congo languages as well as in the Ubangian, Chadic and Central Sudanic families), and are relatively common in the eastern end of New Guinea. They include . To pronounce these, one must attempt to say the velar consonants, but then close their lips for the bilabial component, and then release the lips. Note that, while 90% of the occlusion overlaps, the onset of the velar occurs slightly before that of the labial, and the release of the labial occurs slightly after that of the velar, so that the preceding vowel sounds as if followed by a velar, while the following vowel sounds as if preceded by a labial. Thus the order of the letters in and is not arbitrary, but is motivated by the phonetic details of these sounds.
The Yélî Dnye language of Rossel Island, Papua New Guinea, has both labial–velars and labial–alveolar consonants. Labial–velar stops and nasals also occur in Vietnamese, albeit only at the ends of words.
These sounds are clearly single consonants rather than consonant clusters. The Eggon language, for example, contrasts these possibilities, with and both distinct from . Ignoring tone, we have:
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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