Doubly articulated consonants are consonants with two simultaneous primary places of articulation of the same manner (both plosive, or both nasal, etc.). They are to be distinguished from consonants with secondary articulation, that is, a second articulation not of the same manner. An example of a doubly articulated consonant is the voiceless labial-velar plosive [k͡p], which is a [k] and a [p] pronounced simulataneously. On the other hand, the voiceless labialized velar plosive [kʷ] has only a single stop articulation, velar ([k]), with a simultaneous approximant-like rounding of the lips. In some dialects of Arabic, the voiceless velar fricative [x] has a simultaneous uvular trill, but this is not considered double articulation either. In speech, consonants may have different places of articulation, generally with full or partial stoppage of the airstream. ... In speech there are different ways of producing a consonant. ... The voiceless labial-velar plosive is a type of consonantal sound, used in some spoken languages. ... Labialisation is a secondary articulatory feature of phonemes in a language, most usually used to refer to consonants. ... Velars are consonants articulated with the back part of the tongue (the dorsum) against the soft palate (the back part of the roof of the mouth, known also as the velum). ... Approximants are speech sounds that could be regarded as intermediate between vowels and typical consonants. ... Arabic (العربية) is a Semitic language, closely related to Hebrew and Aramaic. ... The voiceless velar fricative is a type of consonantal sound, used in some spoken languages. ... The uvular trill is a type of consonantal sound, used in some spoken languages. ...

There are four independently controllable articulations that may double up in the same manner of articulation: labial, coronal, dorsal, and radical. (The glottis controls phonation, and works simultaneously with many consonants. It is not normally considered an articulator, and an ejecitive [kʼ], with simultaneous closure of the velum and glottis, is not considered a doubly articulated consonant.) Labials are consonants articulated either with both lips (bilabial articulation) or with the lower lip and the upper teeth (labiodental articulation). ... Coronal consonants are articulated with the flexible front part of the tongue. ... Dorsal consonants are articulated with the back of the tongue against either the hard palate, or the flexible velum just behind it, or even against the uvula. ... Radical consonants are articulated with the root (base) of the tongue in the throat. ... Glottal consonants are consonants articulated with the glottis. ... Phoneticians define phonation as use of the laryngeal system to generate an audible source of acoustic energy, i. ... Ejective consonants are a class of consonants which may contrast with aspirated or unaspirated consonants in a language. ...

With approximants such as [w] and [ɥ], it is not meaningful to distinguish double from secondary articulations, and they will not be discussed further. (See the article on approximants.) Approximants are speech sounds that could be regarded as intermediate between vowels and typical consonants. ...

No claims have ever been made for doubly articulated flaps or trills, such as a simultaneous alveolar-uvular trill, *[ʀ͡r], and these are not expected to be found. Several claims have been made for doubly articulated fricatives or affricates, most notoriously a Swedish which has its own IPA symbol, [ɧ]. However, laboratory measurements have never succeeded in demonstrating simultaneous frication at two points of articulation, and such sounds turn out to be either secondary articulation, or a sequence of two non-simultaneous fricatives. (Despite its name, the "voiceless labial-velar fricative" [ʍ] is actually a voiceless approximant; the name is a historical remnant from before the distinction was made.) Such sounds can be made, with an effort, but it is very difficult for a listener to discern them, and therefore they are not expected to be found. In phonetics, a flap or tap is a type of consonantal sound, which is produced with a single contraction of the muscles so that one articulator is thrown against another. ... In phonetics, a trill is a consonantal sound produced by vibrations between the articulator and the place of articulation. ... Fricative consonants are produced by forcing air through a narrow channel made by placing two articulators close together (e. ... An affricate is a consonant that begins like a stop (most often an alveovelar, such as [t] or [d]) and that doesnt have a release of its own, but opens directly into a fricative (or, in one language, into a trill). ... The voiceless dorso-palatal fricative (also called voiceless postalveolar and velar fricative, voiceless coarticulated velar and palatoalveolar fricative and voiceless dorsovelar fricative) is a type of consonant sound, used in spoken languages, in certain variants and dialects of Swedish, where it is most often known as the sj-sound. ... The voiceless labial-velar fricative is a type of consonantal sound, used in some spoken languages. ...

Clicks are doubly articulated by definition: they are involve a coronal (more rarely labial) forward articulation, or release, plus a dorsal closure that pulls double duty, both as the second place of articulation, and as the controlling mechanism of the velaric ingressive airstream. (Some of these clicks are uvular, rather than velar, but the term "velaric ingressive airstream" is used as the general term. See the article on clicks.) Clicks are stops produced with two articulatory closures in the oral cavity. ... In phonetics, velaric ingressive is an airstream mechanism where a sound is produced by a closure of the velum (or soft palate) and other place of articulation in the front of the oral cavity (such as the alveolar ridge or the lips), and then sucking air in while simultaneously releasing... Clicks are stops produced with two articulatory closures in the oral cavity. ...

This leaves stops, and both oral and nasal doubly articulated stops are found. However, there is a great assymmetry in the places of their articulation. Of the six possible combinations of labial, coronal, dorsal, and radical, one is common, and the others vanishingly rare. The common articulation is labial-dorsal, which is attested by labial-velar stops, such as the [k͡p] mentioned above. These are found throughout West and Central Africa, as well as eastern New Guinea. Labial-velar consonants are doubly articulated at the velum and the lips. ...

A second possibility, labial-coronal, is attested by labial-alveolar and labial-postalveolar consonants in a single language, Yelî Dnye of New Guinea. (See labial-alveolar consonant.)

A third possibility, coronal-dorsal, is found marginally in a few languages. Isoko, in Nigeria, has laminal dental stops (plosives and nasals) that, in some dialects, are realized as dental-palatal stops. However, these are not contrastive with either dental or palatal stops, unlike the articulations mentioned above, and Peter Ladefoged considers them to be "accidental contacts in two regions", rather than being inherently double. Similarly, several languages of Australia, such as Maung, have dental-palatals which are variants of laminal postalveolars, with an "extended closure covering the entire region from the teeth to the hard palate". Note that in both cases, the double articulations are variants of laminal consonants, which have inherently broad contact with the roof of the mouth. A laminal consonant is a phone produced by obstructing the air passage with the flattened end of the tongue. ... Dentals are consonants articulated with either the lower or the upper teeth, or both. ... Peter Ladefoged (1925-) is a British-American phonetician. ... Postalveolar (or palato-alveolar) consonants are consonants articulated with the tip of the tongue between the alveolar ridge (the place of articulation for alveolar consonants) and the palate (the place of articulation for palatal consonants). ...

The other three possibilities, which for stops would need to involve the epiglottis, are not found, but this may be an accidental gap due to the relative rarity of epiglottal consonants. An epiglottal consonant is a consonant that is articulated with the epiglottis against the back of the pharynx. ...