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Phonetics
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==== Coronal ==== Coronal consonants are made with the tip or blade of the tongue and, because of the agility of the front of the tongue, represent a variety not only in place but in the posture of the tongue. The coronal places of articulation represent the areas of the mouth where the tongue contacts or makes a constriction, and include dental, alveolar, and post-alveolar locations. Tongue postures using the tip of the tongue can be [[Apical consonant|apical]] if using the top of the tongue tip, [[laminal]] if made with the blade of the tongue, or [[Retroflex consonant|sub-apical]] if the tongue tip is curled back and the bottom of the tongue is used. Coronals are unique as a group in that every [[manner of articulation]] is attested.{{sfn|International Phonetic Association|2015}}{{sfn|Ladefoged|Maddieson|1996|pp=19β31}} [[Australian languages]] are well known for the large number of coronal contrasts exhibited within and across languages in the region.{{sfn|Ladefoged|Maddieson|1996|p=28}} [[Dental consonant]]s are made with the tip or blade of the tongue and the upper teeth. They are divided into two groups based upon the part of the tongue used to produce them: apical dental consonants are produced with the tongue tip touching the teeth; interdental consonants are produced with the blade of the tongue as the tip of the tongue sticks out in front of the teeth. No language is known to use both contrastively though they may exist [[allophone|allophonically]]. [[Alveolar consonant]]s are made with the tip or blade of the tongue at the alveolar ridge just behind the teeth and can similarly be apical or laminal.{{sfn|Ladefoged|Maddieson|1996|pp=19β25}} Crosslinguistically, dental consonants and alveolar consonants are frequently contrasted leading to a number of generalizations of crosslinguistic patterns. The different places of articulation tend to also be contrasted in the part of the tongue used to produce them: most languages with dental stops have laminal dentals, while languages with apical stops usually have apical stops. Languages rarely have two consonants in the same place with a contrast in laminality, though [[Taa]] (ΗXΓ³Γ΅) is a counterexample to this pattern.{{sfn|Ladefoged|Maddieson|1996|pp=20, 40β1}} If a language has only one of a dental stop or an alveolar stop, it will usually be laminal if it is a dental stop, and the stop will usually be apical if it is an alveolar stop, though for example [[Temne language|Temne]] and [[Bulgarian language|Bulgarian]]{{sfn|Scatton|1984|p=60}} do not follow this pattern.{{sfn|Ladefoged|Maddieson|1996|p=23}} If a language has both an apical and laminal stop, then the laminal stop is more likely to be affricated like in [[Isoko language|Isoko]], though [[Dahalo]] show the opposite pattern with alveolar stops being more affricated.{{sfn|Ladefoged|Maddieson|1996|pp=23β5}} [[Retroflex consonant]]s have several different definitions depending on whether the position of the tongue or the position on the roof of the mouth is given prominence. In general, they represent a group of articulations in which the tip of the tongue is curled upwards to some degree. In this way, retroflex articulations can occur in several different locations on the roof of the mouth including alveolar, post-alveolar, and palatal regions. If the underside of the tongue tip makes contact with the roof of the mouth, it is sub-apical though apical post-alveolar sounds are also described as retroflex.{{sfn|Ladefoged|Maddieson|1996|pp=25, 27β8}} Typical examples of sub-apical retroflex stops are commonly found in [[Dravidian languages]], and in some [[Indigenous languages of the Americas|languages indigenous to the southwest United States]] the contrastive difference between dental and alveolar stops is a slight retroflexion of the alveolar stop.{{sfn|Ladefoged|Maddieson|1996|p=27}} Acoustically, retroflexion tends to affect the higher formants.{{sfn|Ladefoged|Maddieson|1996|p=27}} Articulations taking place just behind the alveolar ridge, known as [[post-alveolar consonant]]s, have been referred to using a number of different terms. Apical post-alveolar consonants are often called retroflex, while laminal articulations are sometimes called palato-alveolar;{{sfn|Ladefoged|Maddieson|1996|pp=27β8}} in the Australianist literature, these laminal stops are often described as 'palatal' though they are produced further forward than the palate region typically described as palatal.{{sfn|Ladefoged|Maddieson|1996|p=28}} Because of individual anatomical variation, the precise articulation of palato-alveolar stops (and coronals in general) can vary widely within a speech community.{{sfn|Ladefoged|Maddieson|1996|p=32}}
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