Lingual Airstream
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In
phonetics Phonetics is a branch of linguistics that studies how humans produce and perceive sounds, or in the case of sign languages, the equivalent aspects of sign. Linguists who specialize in studying the physical properties of speech are phoneticians. ...
, the airstream mechanism is the method by which airflow is created in the
vocal tract The vocal tract is the cavity in human bodies and in animals where the sound produced at the sound source ( larynx in mammals; syrinx in birds) is filtered. In birds it consists of the trachea, the syrinx, the oral cavity, the upper part of the e ...
. Along with phonation and articulation, it is one of three main components of speech production. The airstream mechanism is mandatory for sound production and constitutes the first part of this process, which is called initiation. The organ generating the airstream is called the ''initiator'' and there are three initiators used in spoken human languages: * the
diaphragm Diaphragm may refer to: Anatomy * Thoracic diaphragm, a thin sheet of muscle between the thorax and the abdomen * Pelvic diaphragm or pelvic floor, a pelvic structure * Urogenital diaphragm or triangular ligament, a pelvic structure Other * Diap ...
together with the ribs and lungs ''(pulmonic'' mechanisms), * the
glottis The glottis is the opening between the vocal folds (the rima glottidis). The glottis is crucial in producing vowels and voiced consonants. Etymology From Ancient Greek ''γλωττίς'' (glōttís), derived from ''γλῶττα'' (glôtta), ...
''(glottalic'' mechanisms), and * the
tongue The tongue is a muscular organ in the mouth of a typical tetrapod. It manipulates food for mastication and swallowing as part of the digestive process, and is the primary organ of taste. The tongue's upper surface (dorsum) is covered by taste bu ...
''(lingual'' or ''"velaric"'' mechanisms). Though not used in any language, the
cheek The cheeks ( la, buccae) constitute the area of the face below the eyes and between the nose and the left or right ear. "Buccal" means relating to the cheek. In humans, the region is innervated by the buccal nerve. The area between the insi ...
s may be used to generate the airstream ''(buccal'' mechanism, notated in VoQS). See
buccal speech Alaryngeal speech is speech using an airstream mechanism that uses features other than the glottis to create voicing. There are three types: esophageal, buccal, and pharyngeal speech. Each of these uses an alternative method of creating phonat ...
. After a
laryngectomy Laryngectomy is the removal of the larynx and separation of the airway from the mouth, nose and esophagus. In a total laryngectomy, the entire larynx is removed (including the vocal folds, hyoid bone, epiglottis, thyroid and cricoid cartilage and ...
, the
esophagus The esophagus (American English) or oesophagus (British English; both ), non-technically known also as the food pipe or gullet, is an organ in vertebrates through which food passes, aided by peristaltic contractions, from the pharynx to the ...
may be used as the initiator (notated for simple esophageal speech and for tracheo-esophageal
speech Speech is a human vocal communication using language. Each language uses phonetic combinations of vowel and consonant sounds that form the sound of its words (that is, all English words sound different from all French words, even if they are th ...
in VoQS). See esophageal speech. ''Percussive'' consonants are produced without any airstream mechanism.


Types of airstream mechanism

Any of the three initiators − diaphragm, glottis or tongue − may act by either increasing or decreasing the pressure generating the airstream. These changes in pressure often correspond to outward and inward airflow, and are therefore termed ''
egressive In human speech, egressive sounds are sounds in which the air stream is created by pushing air out through the mouth or nose. The three types of egressive sounds are pulmonic egressive (from the lungs), glottalic egressive (from the glottis) ...
'' and '' ingressive'' respectively. Of these six resulting airstream mechanisms, four are found lexically around the world: * ''
pulmonic In phonetics, the airstream mechanism is the method by which airflow is created in the vocal tract. Along with phonation and articulation, it is one of three main components of speech production. The airstream mechanism is mandatory for sound ...
egressive,'' where the air is pushed out of the lungs by the ribs and
diaphragm Diaphragm may refer to: Anatomy * Thoracic diaphragm, a thin sheet of muscle between the thorax and the abdomen * Pelvic diaphragm or pelvic floor, a pelvic structure * Urogenital diaphragm or triangular ligament, a pelvic structure Other * Diap ...
. All human languages employ such sounds (such as vowels), and nearly three out of four use them exclusively. * ''
glottalic In phonetics, a glottalic consonant is a consonant produced with some important contribution (movement or closure) of the glottis. Glottalic sounds may involve motion of the larynx upward or downward, as the initiator of an egressive or ingr ...
egressive,'' where the air column is compressed as the
glottis The glottis is the opening between the vocal folds (the rima glottidis). The glottis is crucial in producing vowels and voiced consonants. Etymology From Ancient Greek ''γλωττίς'' (glōttís), derived from ''γλῶττα'' (glôtta), ...
moves upward. Such consonants are called
ejectives In phonetics, ejective consonants are usually voiceless consonants that are pronounced with a glottalic egressive airstream. In the phonology of a particular language, ejectives may contrast with aspirated, voiced and tenuis consonants. So ...
. Ejective and ejective-like consonants occur in 16% of the languages. * ''glottalic ingressive,'' where the air column is rarefied as the glottis moves downward. Such consonants are called
implosives Implosive consonants are a group of stop consonants (and possibly also some affricates) with a mixed glottalic ingressive and pulmonic egressive airstream mechanism.''Phonetics for communication disorders.'' Martin J. Ball and Nicole Müller. ...
. Implosive and implosive-like consonants occur in 13% of the world's languages. Despite the name, the airstream may not actually flow inward: While the glottis moves downward, pulmonic air passes outward through it, but the reduction in pressure makes an audible difference to the sound. * ''lingual ingressive,'' AKA ''velaric ingressive,'' where the air in the mouth is rarefied by a downward movement of the tongue. These are the click consonants. Clicks are regular sounds in ordinary words in fewer than 2% of the world's languages, all in Africa. These mechanisms may be combined into airstream
contours Contour may refer to: * Contour (linguistics), a phonetic sound * Pitch contour * Contour (camera system), a 3D digital camera system * Contour, the KDE Plasma 4 interface for tablet devices * Contour line, a curve along which the function h ...
, such as clicks which release into ejectives. The
Khoisan languages The Khoisan languages (; also Khoesan or Khoesaan) are a group of African languages originally classified together by Joseph Greenberg. Khoisan languages share click consonants and do not belong to other African language families. For much o ...
have pulmonic, ejective, and click consonants, the
Chadic languages The Chadic languages form a branch of the Afroasiatic language family. They are spoken in parts of the Sahel. They include 150 languages spoken across northern Nigeria, southern Niger, southern Chad, the Central African Republic, and northern Ca ...
have pulmonic, implosive, and ejective consonants, and the
Nguni languages The Nguni languages are a group of closely related Bantu languages spoken in southern Africa by the Nguni peoples. Nguni languages include Xhosa, Zulu, Ndebele (sometimes referred to as "Northern Ndebele"), and Swazi. The appellation "Nguni ...
utilize all four, pulmonic, click, implosive, and ejective, in normal vocabulary. Most other languages utilize only one or two airstream mechanisms. In
interjection An interjection is a word or expression that occurs as an utterance on its own and expresses a spontaneous feeling or reaction. It is a diverse category, encompassing many different parts of speech, such as exclamations ''(ouch!'', ''wow!''), curse ...
s, the other two mechanisms may be employed. For example, in countries as diverse as Sweden, Turkey, and Togo, a pulmonic ingressive ("gasped" or "inhaled") vowel is used for back-channeling or to express agreement, and in France a lingual egressive (a "spurt") is used to express dismissal. The only language where such sounds are known to be contrastive in normal vocabulary is the extinct ritual language
Damin Damin ( in the practical orthography of Lardil) was a ceremonial language register used by the advanced initiated men of the aboriginal Lardil ( in the practical orthography) and Yangkaal peoples of northern Australia. Both inhabit islan ...
(also the only language outside Africa with clicks); however, Damin appears to have been intentionally designed to differ from normal speech.


Pulmonic initiation

Initiation by means of the lungs (actually the diaphragm and ribs) is called pulmonic initiation. The vast majority of sounds used in human languages are pulmonic egressives. In most languages, including all the languages of Europe (excluding the
Caucasus The Caucasus () or Caucasia (), is a region between the Black Sea and the Caspian Sea, mainly comprising Armenia, Azerbaijan, Georgia (country), Georgia, and parts of Southern Russia. The Caucasus Mountains, including the Greater Caucasus range ...
), all
phoneme In phonology and linguistics, a phoneme () is a unit of sound that can distinguish one word from another in a particular language. For example, in most dialects of English, with the notable exception of the West Midlands and the north-wes ...
s are pulmonic egressives. The only attested use of a phonemic pulmonic ingressive is a lateral fricative in
Damin Damin ( in the practical orthography of Lardil) was a ceremonial language register used by the advanced initiated men of the aboriginal Lardil ( in the practical orthography) and Yangkaal peoples of northern Australia. Both inhabit islan ...
, a ritual language formerly used by speakers of Lardil in Australia. This can be written with the extended version of the International Phonetic Alphabet as .
!Xóõ Taa , also known as ǃXóõ (also spelled ǃKhong and ǃXoon; ), is a Tuu language notable for its large number of phonemes, perhaps the largest in the world. It is also notable for having perhaps the heaviest functional load of click consona ...
has ingression as a phonetic detail in one series of its clicks, which are ''ingressive voiceless nasals with delayed aspiration'', .
Peter Ladefoged Peter Nielsen Ladefoged ( , ; 17 September 1925 – 24 January 2006) was a British linguist and phonetician. He was Professor of Phonetics at University of California, Los Angeles (UCLA), where he taught from 1962 to 1991. His book '' A Cou ...
considers these to be among the most difficult sounds in the world. Other languages, for example in
Taiwan Taiwan, officially the Republic of China (ROC), is a country in East Asia, at the junction of the East and South China Seas in the northwestern Pacific Ocean, with the People's Republic of China (PRC) to the northwest, Japan to the northe ...
, have been claimed to have pulmonic ingressives, but these claims have either proven to be spurious or to be occasional phonetic detail. In
interjection An interjection is a word or expression that occurs as an utterance on its own and expresses a spontaneous feeling or reaction. It is a diverse category, encompassing many different parts of speech, such as exclamations ''(ouch!'', ''wow!''), curse ...
s, but not in normal words, pulmonic ingressive vowels or words occur on all continents. This is commonly done for back-channeling (as with in Ewe) or affirmation (as with in
Swedish Swedish or ' may refer to: Anything from or related to Sweden, a country in Northern Europe. Or, specifically: * Swedish language, a North Germanic language spoken primarily in Sweden and Finland ** Swedish alphabet, the official alphabet used by ...
). In English, an audible intake of breath, , or an indrawn consonant such as or is used in a conversation to indicate that someone is about to speak or is preparing to continue speaking. In some languages, such as Finnish and Amharic, entire phrases may be uttered with an ingressive airstream. (See
ingressive sound In phonetics, ingressive sounds are sounds by which the airstream flows inward through the mouth or nose. The three types of ingressive sounds are lingual ingressive or velaric ingressive (from the tongue and the velum), glottalic ingressive ...
.)


Glottalic initiation

It is possible to initiate airflow in the upper vocal tract by means of the vocal cords or
glottis The glottis is the opening between the vocal folds (the rima glottidis). The glottis is crucial in producing vowels and voiced consonants. Etymology From Ancient Greek ''γλωττίς'' (glōttís), derived from ''γλῶττα'' (glôtta), ...
. This is known as glottalic initiation. For egressive glottalic initiation, one lowers the glottis (as if to sing a low note), closes it as for a glottal stop, and then raises it, building up pressure in the oral cavity and upper
trachea The trachea, also known as the windpipe, is a cartilaginous tube that connects the larynx to the bronchi of the lungs, allowing the passage of air, and so is present in almost all air-breathing animals with lungs. The trachea extends from th ...
. Glottalic egressives are called
ejective In phonetics, ejective consonants are usually voiceless consonants that are pronounced with a glottalic egressive airstream. In the phonology of a particular language, ejectives may contrast with aspirated, voiced and tenuis consonants. So ...
s. The glottis must be fully closed to form glottalic egressives, or the air column would flow backwards over it; it is therefore impossible to pronounce
voiced Voice or voicing is a term used in phonetics and phonology to characterize speech sounds (usually consonants). Speech sounds can be described as either voiceless (otherwise known as ''unvoiced'') or voiced. The term, however, is used to refe ...
ejectives. Ejective allophones of voiceless stops occur in many varieties of English at the ends of intonation units. For ingressive glottalic initiation, the sequence of actions performed in glottalic pressure initiation is reversed:  one raises the glottis (as if to sing a high note), closes it, and then lowers it to create suction in the upper trachea and oral cavity. Glottalic ingressives are called
implosive Implosive consonants are a group of stop consonants (and possibly also some affricates) with a mixed glottalic ingressive and pulmonic egressive airstream mechanism.''Phonetics for communication disorders.'' Martin J. Ball and Nicole Müller. ...
s, although they may involve zero airflow rather than actual inflow. Because the air column would flow forwards over the descending glottis, it is not necessary to fully close it, and implosives may be voiced; indeed, voiceless implosives are exceedingly rare. It is usual for implosives to be voiced. Instead of keeping the glottis tightly closed, it is tensed but left slightly open to allow a thin stream of air through. Unlike pulmonic voiced sounds, in which a stream of air passes through a usually-fixed glottis, in voiced implosives a mobile glottis passes over a nearly motionless air column to cause vibration of the vocal cords. Phonations that are more open than modal voice, such as breathy voice, are not conducive to glottalic sounds because in these the glottis is held relatively open, allowing air to readily flow through and preventing a significant pressure difference from building up behind the articulator. Because the oral cavity is so much smaller than the lungs,
vowel A vowel is a syllabic speech sound pronounced without any stricture in the vocal tract. Vowels are one of the two principal classes of speech sounds, the other being the consonant. Vowels vary in quality, in loudness and also in quantity (l ...
s and approximants cannot be pronounced with glottalic initiation. So-called
glottalized Glottalization is the complete or partial closure of the glottis during the articulation of another sound. Glottalization of vowels and other sonorants is most often realized as creaky voice (partial closure). Glottalization of obstruent consonan ...
vowels and other sonorants use the more common pulmonic egressive airstream mechanism. There is no clear divide between pulmonic and glottalic sounds. Some languages may have consonants which are intermediate. For example, glottalized consonants in London English, such as the ''t'' in ''rat'' , may be weakly ejective. Similarly, fully voiced stops in languages such as Thai, Zulu, and
Maidu The Maidu are a Native American people of northern California. They reside in the central Sierra Nevada, in the watershed area of the Feather and American rivers. They also reside in Humbug Valley. In Maiduan languages, ''Maidu'' means "man." ...
are weakly implosive. This ambiguity does not occur with the next airstream mechanism, lingual, which is clearly distinct from pulmonic sounds.


Lingual (velaric) initiation

The third form of initiation in human language is lingual or velaric initiation, where a sound is produced by a closure at two places of articulation, and the airstream is formed by movement of the body of the tongue. Lingual stops are more commonly known as clicks, and are almost universally ingressive. The word ''lingual'' is derived from Latin ''lingua'', which means tongue. To produce a
lingual ingressive In phonetics, ingressive sounds are sounds by which the airstream flows inward through the mouth or nose. The three types of ingressive sounds are lingual ingressive or velaric ingressive (from the tongue and the velum), glottalic ingressive ( ...
airstream, first close the vocal tract at two places: at the back of the tongue, as in a
velar 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). Since the velar region of the roof of the mouth is relatively extensive ...
or
uvular Uvulars are consonants articulated with the back of the tongue against or near the uvula, that is, further back in the mouth than velar consonants. Uvulars may be stops, fricatives, nasals, trills, or approximants, though the IPA does not prov ...
stop, and simultaneously with the front of the tongue or the lips, as in a coronal or bilabial stop. These holds may be voiceless, voiced, or nasalized. Then lower the body of the tongue to rarefy the air above it. The closure at the front of the tongue is opened first, as the click "release"; then the closure at the back is released for the pulmonic or glottalic click "accompaniment" or "efflux". This may be aspirated, affricated, or even
ejective In phonetics, ejective consonants are usually voiceless consonants that are pronounced with a glottalic egressive airstream. In the phonology of a particular language, ejectives may contrast with aspirated, voiced and tenuis consonants. So ...
. Even when not ejective, it is not uncommon for the glottis to be closed as well, for a triply articulated consonant, and this third closure is released last to produce a glottalized click. Clicks are found in very few languages, notably the
Khoisan languages The Khoisan languages (; also Khoesan or Khoesaan) are a group of African languages originally classified together by Joseph Greenberg. Khoisan languages share click consonants and do not belong to other African language families. For much o ...
of southern Africa and some nearby tongues such as Zulu. They are more often found in extra-linguistic contexts, such as the "tsk tsk" sound many Westerners use to express regret or pity (a
dental click Dental (or more precisely denti-alveolar) clicks are a family of click consonants found, as constituents of words, only in Africa and in the Damin ritual jargon of Australia. In English, the ''tut-tut!'' (British spelling, "tutting") or ' ...
), or the clucking noise used by many
equestrians Equestrianism (from Latin , , , 'horseman', 'horse'), commonly known as horse riding (Commonwealth English) or horseback riding (American English), includes the disciplines of riding, driving, and vaulting. This broad description includes the ...
to urge on their horses (a
lateral click The lateral clicks are a family of click consonants found only in African languages. The clicking sound used by equestrians to urge on their horses is a lateral click, although it is not a speech sound in that context. Lateral clicks are foun ...
). Lingual egressive initiation is performed by reversing the sequence of a lingual ingressive: the front and back of the tongue (or lips and back of the tongue) seal off the vocal cavity, and the cheeks and middle of the tongue move inward and upward to increase oral pressure. The only attested use of a lingual egressive is a bilabial nasal egressive click in
Damin Damin ( in the practical orthography of Lardil) was a ceremonial language register used by the advanced initiated men of the aboriginal Lardil ( in the practical orthography) and Yangkaal peoples of northern Australia. Both inhabit islan ...
. Transcribing this also requires the use of the Extended IPA, . Since the air pocket used to initiate lingual consonants is so small, it is not thought to be possible to produce lingual
fricative A fricative is a consonant manner of articulation, produced by forcing air through a narrow channel made by placing two Place of articulation, articulators close together. These may be the lower lip against the upper teeth, in the case of ; the ba ...
s, vowels, or other sounds which require continuous airflow. Clicks may be
voiced Voice or voicing is a term used in phonetics and phonology to characterize speech sounds (usually consonants). Speech sounds can be described as either voiceless (otherwise known as ''unvoiced'') or voiced. The term, however, is used to refe ...
, but they are more easily nasalized. This may be because the vocal cavity behind the rearmost closure, behind which the air passing through the glottis for voicing must be contained, is so small that clicks cannot be voiced for long. Allowing the airstream to pass through the nose enables a longer production. Nasal clicks involve a combination of lingual and pulmonic mechanisms. The velum is lowered so as to direct pulmonic airflow through the nasal cavity during the lingual initiation. This nasal airflow may itself be egressive or ingressive, independently of the lingual initiation of the click. Nasal clicks may be voiced, but are very commonly unvoiced and even aspirated, which is rare for purely pulmonic nasals.


Airstream contours

In some treatments, complex clicks are posited to have airstream contours, in which the airstream changes between the front (click) and rear (non-click) release. There are two attested types:
Linguo-pulmonic Pulmonic-contour clicks, also called sequential linguo-pulmonic consonants, are consonants that transition from a click consonant, click to an ordinary pulmonic consonant, pulmonic sound, or more precisely, have an audible delay between the fron ...
consonants, where the rear release is a uvular obstruent such as or ; and
linguo-glottalic Ejective-contour clicks, also called sequential linguo-glottalic consonants, are consonants that transition from a click to an ejective sound, or more precisely, have an audible delay between the front and rear release of the click. All click t ...
consonants, where the rear release is an ejective such as or . Simultaneous (rather than contour) implosive clicks, e.g. velar and uvular are not only possible but velar implosive clicks easier to produced than modally voiced clicks. However, they are not attested in any language.Kenneth Pike, ed. Ruth Brend (1972) ''Selected Writings: To Commemorate the 60th Birthday of Kenneth Lee Pike''. p. 226


Percussive consonants

Consonants may be pronounced without any airstream mechanism. These are ''percussive'' consonants, where the sound is generated by one organ striking another. Percussive consonants are not phonemic in any known language, though the extensions to the IPA for disordered speech provide symbols for a bilabial percussive (smacking lips) and a bidental percussive (gnashing teeth). The only percussive known to be used in nondisordered speech is a
sublingual percussive The alveolar or postalveolar clicks are a family of click consonants found only in Africa and in the Damin ritual jargon of Australia. The tongue is more or less concave (depending on the language), and is pulled down rather than back as in t ...
(a tongue slap) that appears allophonically in the release of
alveolar click The alveolar or postalveolar clicks are a family of click consonants found only in Africa and in the Damin ritual jargon of Australia. The tongue is more or less concave (depending on the language), and is pulled down rather than back as i ...
s in the
Sandawe language Sandawe is a language spoken by about 60,000 Sandawe people in the Dodoma Region of Tanzania. Sandawe's use of click consonants, a rare feature shared with only two other languages of East Africa – Hadza and Dahalo, had been the basis of it ...
of Tanzania.


See also

*
Manner of articulation 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, ...
*
Index of phonetics articles A * Acoustic phonetics * Active articulator * Affricate * Airstream mechanism * Alexander John Ellis * Alexander Melville Bell * Alfred C. Gimson * Allophone * Alveolar approximant () * Alveolar click () * Alveolar consonant * Alveolar ...


References


External links


Eating the Wind
a satirical, but illustrative example of sound symbolism and iconicity of airstream mechanisms.

Robert Eklund (2008). Pulmonic ingressive phonation: Diachronic and synchronic characteristics, distribution and function in animal and human sound production and in human speech. ''Journal of the International Phonetic Association'', vol. 38, no. 3, pp. 235–324.

Robert Eklund's website devoted to ingressive speech. Maps, sound files, and spectrograms.

Samples of ingressive pulmonic interjections from Northern Sweden {{Articulation navbox Phonetics