Lateral consonant in the context of "Airstream mechanism"

In articulatory phonetics, the manner of articulation is the configuration and interaction of the articulators (speech organs such as the tongue, lips, and palate) when making a speech sound. One parameter of manner is stricture, that is, how closely the speech organs approach one another. Others include those involved in the r-like sounds (taps and trills), and the sibilancy of fricatives.

The concept of manner is mainly used in the discussion of consonants, although the movement of the articulators will also greatly alter the resonant properties of the vocal tract, thereby changing the formant structure of speech sounds that is crucial for the identification of vowels. For consonants, the place of articulation and the degree of phonation or voicing are considered separately from manner, as being independent parameters. Homorganic consonants, which have the same place of articulation, may have different manners of articulation. Often nasality and laterality are included in manner, but some phoneticians, such as Peter Ladefoged, consider them to be independent.

In linguistics, a liquid consonant or simply liquid is any of a class of consonants that consists of rhotics and voiced lateral approximants, which are also sometimes described as "R-like sounds" and "L-like sounds". The word liquid seems to be a calque of the Ancient Greek word ὑγρός (hygrós 'moist'), initially used by grammarian Dionysius Thrax to describe Greek sonorants.

Liquid consonants are more prone to be part of consonant clusters and of the syllable nucleus. Their third formants are generally non-predictable based on the first two formants. Another important feature is their complex articulation, which makes them a hard consonant class to study with precision and the last consonants to be produced by children during their phonological development. They are also more likely to undergo certain types of phonological changes such as assimilation, dissimilation and metathesis.

A median consonant, also known as a central consonant (not to be confused with the articulation of a central vowel), is a consonant sound that is produced when air flows along the midline of the mouth over the tongue. The class contrasts with lateral consonants, in which air flows over one or both sides of the tongue.

Examples of median consonants are the voiced alveolar fricative (the "z" in the English word "zoo") and the palatal approximant (the "y" in the English word "yes"). Others are the median fricatives [θ ð s z ʃ ʒ ʂ ʐ ɕ ʑ ç ʝ x ɣ χ ʁ], the median approximants [ɹ ɻ j ɥ ɰ w ʍ], the trills [r ʀ], and the median flaps [ɾ ɽ].

Approximants are speech sounds that involve the articulators approaching each other but not narrowly enough, nor with enough articulatory precision, to create turbulent airflow. Therefore, approximants fall between fricatives, which produce a turbulent airstream, and vowels, which produce no turbulence. This class is composed of sounds like [ɹ] (as in rest) and semivowels like [j] and [w] (as in yes and west, respectively), as well as lateral approximants like [l] (as in less).

The Sounds of the World's Languages, sometimes abbreviated SOWL, is a 1996 book by Peter Ladefoged and Ian Maddieson which documents a global survey of the sound patterns of natural languages. Drawing from the authors' own fieldwork and experiments as well as existing literature, it provides an articulatory and acoustic description of vowels and consonants from more than 300 languages. It is a prominent reference work in the field of phonetics.

Following discussions of the book's aim and underlying frameworks, the description of sounds is divided into chapters on stops, nasals and nasalized consonants, fricatives, laterals, rhotics, clicks, vowels, and multiple articulatory gestures, which are then followed by a discussion of the data's phonological implications.