百度 她也坦言被报道吓到，随后有很多朋友恭喜她，但自己真的没有怀孕。

The voiceless alveolar fricatives are a type of fricative consonant pronounced with the tip or blade of the tongue against the alveolar ridge (gum line) just behind the teeth. This refers to a class of sounds, not a single sound. There are at least six types with significant perceptual differences:

• The voiceless alveolar sibilant [s] (the standard symbol in the International Phonetic Alphabet or IPA) has a strong hissing sound, as the s in English sink. It is one of the most common sounds in the world.
• The voiceless denti-alveolar sibilant [s?] (an ad hoc notation), also called apico-dental, has a weaker lisping sound like English th in thin. It occurs in Spanish dialects in southern Spain (eastern Andalusia).
• The voiceless alveolar retracted sibilant [s?], and the subform apico-alveolar [s?], or called grave, has a weak hushing sound reminiscent of retroflex fricatives. It is used in the languages of northern Iberia, like Asturleonese, Basque, Peninsular Spanish (excluding parts of Andalusia), Catalan, Galician, and Northern European Portuguese. A similar retracted sibilant form is also used in Dutch, Icelandic, some southern dialects of Swedish, Finnish, and Greek. The retracted "S" is also used in Amerindian languages such as Muscogee, Garifuna, and many varieties of Quechua. It was supposedly the standard sound of s in Classical Latin. Its sound is between [s] and [?].
• The voiceless alveolar non-sibilant fricative [θ?] or [θ?], using the alveolar diacritic from the Extended IPA, is similar to the th in English thin. It occurs in Icelandic as well as an intervocalic and word-final allophone of English /t/ in dialects such as Hiberno-English and Scouse.
• The voiceless alveolar lateral fricative [?] sounds like a voiceless, strongly articulated version of English l (somewhat like what the English cluster **hl would sound like) and is written as ll in Welsh.

The first three types are sibilants, meaning that they are made by directing a stream of air with the tongue towards the teeth and have a piercing, perceptually prominent sound.

Voiceless coronal fricatives

		Dental	Denti- alveolar	Alveolar	Post-alveolar
					Retracted	Retroflex	Palato- alveolar	Alveolo- palatal
Sibilant	plain	s?	s?	s?	s?	?	?	?
Non-sibilant		θ		θ?		???
	tapped			???

Coronal sibilants

		IPA symbol	meaning
place of articulation	passive (mouth)	?s??	dental
		?s??	advanced (denti-alveolar)
		?s??	alveolar
		?s??	retracted (postalveolar)
	active (tongue)	?s??	apical
		?s??	laminal
		???	retroflex
	secondary	?s??	palatalized coronal
		???	alveolo-palatal
		???	palato-alveolar
		?s??	labialized coronal
		?s??	velarized coronal
		?s??	pharyngealized coronal
voice-onset time		?s??	aspirated coronal

Voiceless alveolar sibilant

Voiceless alveolar sibilant
s
IPA number	132
Audio sample
source · help
Encoding
Entity (decimal)	s
Unicode (hex)	U+0073
X-SAMPA	s
Braille
Image

Voiceless dentalized alveolar sibilant
s?
s?
IPA number	130
Encoding
X-SAMPA	s_d

Voiceless alveolar retracted sibilant
s?
s?
Audio sample
source · help
Encoding
Entity (decimal)	s?̺
Unicode (hex)	U+0073?U+033A

The voiceless alveolar sibilant is a common consonant sound in vocal languages. It is the sound in English words such as sea and pass, and is represented in the International Phonetic Alphabet with ?s?. It has a characteristic high-pitched, highly perceptible hissing sound. For this reason, it is often used to get someone's attention, using a call often written as sssst! or psssst!.

The voiceless alveolar sibilant [s] is one of the most common sounds cross-linguistically. If a language has fricatives, it will most likely have [s]. However, some languages have a related sibilant sound, such as [?], but no [s]. In addition, sibilants are absent from most Australian Aboriginal languages, in which fricatives are rare; however, [s] does occur in Kalaw Lagaw Ya.

Comparison between English and Spanish

The term "voiceless alveolar sibilant" is potentially ambiguous in that it can refer to at least two different sounds. Various languages of northern Iberia (e.g., Astur-Leonese, Catalan, Basque, Galician, Portuguese and Spanish) have a so-called "voiceless apico-alveolar sibilant" that lacks the strong hissing of the [s] described in this article but has a duller, more "grave" sound quality somewhat reminiscent of a voiceless retroflex sibilant. Basque, Mirandese and some Portuguese dialects in northeast Portugal (as well as medieval Spanish and Portuguese in general) have both types of sounds in the same language.

There is no general agreement about what actual feature distinguishes these sounds. Spanish phoneticians normally describe the difference as apical (for the northern Iberian sound) vs. laminal (for the more common sound), but Ladefoged and Maddieson claim that English /s/ can be pronounced apically, which is evidently not the same as the apical sibilant of Iberian Spanish and Basque. Also, Adams asserts that many dialects of Modern Greek have a laminal sibilant with a sound quality similar to the "apico-alveolar" sibilant of northern Iberia.

Some authors have instead suggested that the difference lies in tongue shape. Adams describes the northern Iberian sibilant as "retracted". Ladefoged and Maddieson appear to characterize the more common hissing variant as grooved, and some phoneticians (such as J. Catford) have characterized it as sulcal (which is more or less a synonym of "grooved"), but in both cases, there is some doubt about whether all and only the "hissing" sounds actually have a "grooved" or "sulcal" tongue shape.

Features

Features of the voiceless alveolar sibilant:

• Its manner of articulation is sibilant fricative, which means it is generally produced by channeling air flow along a groove in the back of the tongue up to the place of articulation, at which point it is focused against the sharp edge of the nearly clenched teeth, causing high-frequency turbulence.
• There are at least three specific variants of [s]:
  • Dentalized laminal alveolar (commonly called "dental"), which means it is articulated with the tongue blade very close to the upper front teeth, with the tongue tip resting behind lower front teeth. The hissing effect in this variety of [s] is very strong.
  • Non-retracted alveolar, which means it is articulated with either the tip or the blade of the tongue at the alveolar ridge, termed respectively apical and laminal. According to Ladefoged & Maddieson (1996) about half of English speakers use a non-retracted apical articulation.
  • Retracted alveolar, which means it is articulated with either the tip or the blade of the tongue slightly behind the alveolar ridge, termed respectively apical and laminal. Acoustically, it is close to laminal [?] or (to a lesser extent) [?].
• Its phonation is voiceless, which means it is produced without vibrations of the vocal cords. In some languages the vocal cords are actively separated, so it is always voiceless; in others the cords are lax, so that it may take on the voicing of adjacent sounds.
• It is an oral consonant, which means air is allowed to escape through the mouth only.
• It is a central consonant, which means it is produced by directing the airstream along the center of the tongue, rather than to the sides.
• Its airstream mechanism is pulmonic, which means it is articulated by pushing air solely with the intercostal muscles and abdominal muscles, as in most sounds.

Occurrence

Dentalized laminal alveolar

Language		Word	IPA	Meaning	Notes
Arabic	Gulf	???? (masjid)	[m??s?d???d?]	'mosque'
Armenian	Eastern	??? (sar)	[s?ɑ?]?	'mountain'
Azerbaijani		su	[s?u]	'water'
Basque		gauza	[ɡ?us??]	'thing'	Contrasts with an apical sibilant. See Basque phonology
Belarusian		стагоддзе (sta?oddzě)	[s?t????od?d??z??e]	'century'	Contrasts with palatalized form. See Belarusian phonology
Bulgarian		всеки (vseki)	[?fs??k?i]	'everyone'	Contrasts with palatalized form.
Chinese	Mandarin	三 (sān)	[s?a?n]	'three'	See Mandarin phonology
Czech		svět	[s?vj?t?]	'world'	See Czech phonology
Chuvash		сав?т/sav?t	[s?a??t]	'vessel, glass'
English	Auckland	sand	[s??n?d?]	'sand'	See English phonology
	Multicultural London		[s?an?d?]
French		fa?ade	[f?s??d?]	'front'	See French phonology
Hungarian		sziget	[?s?iɡ?t?]	'island'	See Hungarian phonology
Italian	Standard	sali	[?s??li]	'you go up'	Varies between dentalized laminal and non-retracted apical. See Italian phonology
	Ticino				Varies between dentalized laminal and non-retracted apical. Both variants may be labiodentalized. See Italian phonology
Kashubian
Kazakh		сом/sum	[s?u??m]	'pure'
Kyrgyz		сабиз (sabiz)	[s???bis?]	'carrot'
Latvian		sens	[s?en?s?]	'ancient'	See Latvian phonology
Macedonian		скока (skoka)	[?s?k?k?]	'jump'	See Macedonian phonology
Mirandese					Contrasts seven sibilants altogether, preserving medieval Ibero-Romance contrasts.
Norwegian	Urban East	sand	[sɑn?]	'sand'	Most often dentalized laminal, but can be non-retracted apical for some speakers. See Norwegian phonology
Polish		sum	[s?um]?	'catfish'	See Polish phonology
Romanian		surd	[s?ur?d?]	'deaf'	See Romanian phonology
Russian		волосы (volosy)	[?vo????s???]?	'hair'	Contrasts with palatalized form. See Russian phonology
Scottish Gaelic		Slàinte	[?s?????n?t????]	'cheers'	See Scottish Gaelic phonology
Serbo-Croatian		село (selo)	[s???lo?]	'village'	See Serbo-Croatian phonology
Slovak		sto	[st?]	'hundred'	See Slovak phonology
Slovene		svet	[s??ê?t?]	'world'	See Slovene phonology
Spanish	Iberian	estar	[e?s??t???]	'to be'	Allophone of /s/ before dental consonants. See Spanish phonology
Swedish	Central Standard	s?te	[?s???t?e]	'seat'	Retracted in some southern dialects. See Swedish phonology
Toda		???? (kos)	[k?s?]	'money'	Contrasts /θ s? s? ? ?/. Voiced allophones are found in fast speech.
Turkish		su	[s?u]	'water'	See Turkish phonology
Ukrainian		село (selo)	[s??????]	'village'	Contrasts with palatalized form. See Ukrainian phonology
Upper Sorbian		sowa	[?s?ow?]	'owl'
Uzbek		so?t	[?s?o??t?]	'hour'
Vietnamese	Hanoi	xa	[s???]	'far'	See Vietnamese phonology

Non-retracted alveolar

Language		Word	IPA	Meaning	Notes
Adyghe		сэ/s?	[sa]	'I'
Arabic	Modern Standard	?????/?alasa	[?d??l?s?]	'to sit'	See Arabic phonology
Assyrian		???? sèpa	[se?pa?]	'sword'
Bengali		??????	[ra?st?a]	'street'	See Bengali phonology
Burmese		?????	[s? k?á??]	'camp'
Chechen		сурт / surt	[su?rt]	'picture'
Chinese	Cantonese	閃 / sim2	[si?m??]	'twinkle'	See Cantonese phonology
Danish		s?lge	[?selj?]	'sell'	Most often non-retracted apical, but can be dentalized laminal for some speakers. See Danish phonology
Dutch	Belgian Standard	scheepvaart	[?sxe??p??fa?rt]?	'navigation'	Laminal. See Dutch phonology
	Northern Standard		[?sχep??fa??t?]?		Laminal. It is laxer than in English, has a graver friction and is sometimes labialized. It is often retracted when preconsonantal, after rounded vowels and /r/. See Dutch phonology
Emilian		sèl	[?s????l]	'salt'	Palatalized apical; may be [?] or [?] instead.
English		sit	[s??t?]?	'sit'	See English phonology
Esperanto		Esperanto	[espe?ranto]	'Who hopes'	See Esperanto phonology
Faroese		sandur	[sand??]	'sand'
German	Standard	Biss	[b?s]	'bite'	Varies between dentalized laminal, non-retracted laminal and non-retracted apical. See Standard German phonology
Georgian		????/sami	[?sɑmi]	'three'
Hebrew		???/sefer	[?sefe?]	'book'	See Modern Hebrew phonology
Hindustani		??? / ???	[sa?l]	'year'	See Hindustani phonology
Italian	Standard	sali	[?s??li]	'you go up'	Varies between dentalized laminal and non-retracted apical. See Italian phonology
	Ticino				Varies between dentalized laminal and non-retracted apical. Both variants may be labiodentalized. See Italian phonology
Japanese		複数形 / fukusūkē	[??k??s??ke?]	'plural'	See Japanese phonology
Kabardian		сэ/s?	[sa]	'I'
Karen	S'gaw Karen	???	[sē]	'silver'
	Western Pwo	????	[sài?]	'to run'
Kat?		su	[su]	'sun'
Khmer		???????? / éspanh	[?e??spa??]	noun: 'Spain' adjective: 'Spanish'	See Khmer phonology
		??????? / masin	[ma??si?n]	'machine'
Korean		? / seom	[s??m]	'island'	See Korean phonology
Malay		satu	[satu]	'one'
Malayalam		???????	[s??p??n??m]	'dream'
Maltese		iebes	[ea?bes]	'hard'
Marathi		???	[sa?p]	'snake'	See Marathi phonology
Nepali		???????	[s?ɡ?rm?t???]	'Mount Everest'	See Nepali phonology
Odia		????	[s?m?n?]	'equal'
Occitan	Limousin	maichent	[mej?s?]	'bad'
Persian		??? / sib	[sib]	'apple'	See Persian phonology
Portuguese		ca?o	[?kasu]	'I hunt'	See Portuguese phonology
Punjabi		???/sapp	[s?p?]	'snake'
Spanish	Latin American	saltador	[s?a?l?t?a??e?o?r]	'jumper'	See Spanish phonology and Seseo
	Canarian
	Andalusian
	Filipino
Swahili		Kiswahili	[kiswa?hili]	'Swahili'
Sylheti		????/oise	[?ise]	'done'
Tagalog		lasa	[?las?]	'taste'
Tamil		??????	[si??a?]	'Seetha'	See Tamil phonology
Ticino					Varies between dentalized laminal and non-retracted apical. Both variants may be labiodentalized. See Italian phonology
Vietnamese		xa	[sa??]	'far'	See Vietnamese phonology
Yi		? sy	[s???]	'die'

Retracted alveolar

Language		Word	IPA	Meaning	Notes
Asturian		pasu	[?p?s?u]	'step'	Apical.
Basque		su	[s?u]	'fire'	Apical. Contrasts with a dentalized laminal sibilant.
Bengali		?/??	[s???]	'hundred'	See Bengali phonology
Catalan	Most dialects	set	[?s??t?]	'seven'	Apical. See Catalan phonology
	Some Valencian speakers	peix	[?pe?js??]	'fish'	Normally transcribed with ???; realized as pre-palatal [?] in Standard Catalan and Valencian.
		patisc	[p??t?is??k]	'I suffer'
Dutch	Netherlandic speakers	sik	[?s??k?]?	'goatee'	Laminal and on the lax end of articulation spectrum. Can be labialized. If rertracted is not the main allophone, may appear as such when preconsonantal, after rounded vowels and /r/. See Dutch phonology
English	Glasgow	sun	[s??n]	'sun'	Working-class pronunciation, other speakers may use a non-retracted [s]
Emilian		sèinpar	[?s???.p?r]	'always'
Estonian		s?na	[?s?nɑ]	'word'
Finnish		sin?	[?sin?]	'you'	Varies between non-retracted and retracted. See Finnish phonology
Galician		saúde	[s???uee]	'health'	Apical.
Greek		Κωνσταντινο?πολι? / Kōnstantinoúpolis	[ko?n?st?ndi ?n?u?po?lis??]?	'Constantinople'	Varies between non-retracted and retracted, depending on the environment. See Modern Greek phonology
Icelandic		USSS	[????s??]?	'(initialism) USSS'	Usualy apical, can alternatively be laminal. See Icelandic phonology
Italian	Central Italy	sali	[?s???li]	'you go up'	Present in Lazio north of Cape Linaro, most of Umbria (save Perugia and the extreme south), Marche and south of Potenza.
	Northern Italy				Apical. Present in many areas north of the La Spezia–Rimini Line. Derived from local languages of northern Italy. See Italian phonology
	Sicily				Present south and west of a line drawn from Syracuse to Cefalù.
Leonese		pasu	[?p?s??]	'step'	Apical.
Low German
Mirandese		passo	[?p?s?u]	'step'	Apical. Contrasts with /s?/.
Occitan	Gascon	dos	[d?ys?]	'two'	See Occitan phonology
	Languedocien		[d?us?]
Piedmontese		sapin	[s?api?]	'pine'	Apical.
Portuguese	European, inland northern	cansa?o	[k???s?as?u]	'weariness'	Apical. Contrasts with /s?/. See Portuguese phonology
	European, coastal northern		[k???s?as?u]		Merges with /s?/. See Portuguese phonology
	Inland and southern capixaba	pescador	[pe?s?k??d?oχ]	'fisherman'	Realization of Portuguese coda sibilant, which may be postalveolars, depending on dialect
	Carioca do brejo	escadas	[is??k?d??s?]	'stairs'
Spanish	Andean	saltador	[s??l?t???e?o??]	'jumper'	Apical. In Andean and Paisa (except in southern parts of Antioquia) alternates with a more frequent coronal-dental /s/. See Spanish phonology and seseo
	Castilian
	Paisa accent
Swedish	Blekinge	s?te	[?s???te]	'seat'	See Swedish phonology
	Bohusl?n
	Halland
	Scania
Toda		pōs?	[po:s?]	'milk'	Contrasts /θ s? s? ? ?/. Voiced allophones are found in fast speech.
Vietnamese	Saigon	xe	[s???]	'vehicle'	Apical.
West Frisian		salt	[s??t]	'salt'	Laminal. It is laxer than in English and has a graver friction. It varies between retracted and non-retracted, depending on the environment. See West Frisian phonology

Voiceless apico-alveolar sibilant

The voiceless alveolar retracted sibilant (commonly termed the voiceless apico-alveolar sibilant) is a fricative that is articulated with the tongue in a hollow shape, usually with the tip of the tongue (apex) against the alveolar ridge. It is a sibilant sound and is found most notably in a number of languages in a linguistic area covering northern and central Iberia. It is most well known from its occurrence in the Spanish of this area. In the Middle Ages, it occurred in a wider area, covering Romance languages spoken throughout France, Portugal, and Spain, as well as Old High German and Middle High German.

Occurrence in Europe

Modern

In Romance languages, it occurs as the normal voiceless alveolar sibilant in Astur-Leonese, Castilian Spanish, Catalan, Galician, northern European Portuguese, and some Occitan dialects. It also occurs in Basque and Mirandese, where it is opposed to a different voiceless alveolar sibilant, the more common [s]; the same distinction occurs in a few dialects of northeastern Portuguese. Outside this area, it also occurs in a few dialects of Latin American Spanish (e.g. Antioque?o and Pastuso, in Colombia).

Amongst Germanic languages, it occurs in Dutch (and closely related Low German), Icelandic, many dialects in Scandinavia, and working-class Glaswegian English.

It also occurs in Modern Greek (with a laminal articulation), as well as the Baltic languages.

There is no single IPA symbol used for this sound. The symbol ?s?? is often used, with a diacritic indicating an apical pronunciation. However, that is potentially problematic in that not all alveolar retracted sibilants are apical (see below), and not all apical alveolar sibilants are retracted. The ad hoc non-IPA symbols ??? and ?S? are often used in the linguistic literature even when IPA symbols are used for other sounds, but ??? is a common transcription of the retroflex sibilant [?].

Medieval

In medieval times, it occurred in a wider area, including the Romance languages spoken in most or all of France and Iberia (Old Spanish, Galician-Portuguese, Catalan, French, etc.), as well as in the Old and Middle High German of central and southern Germany, and most likely Northern Germany as well. In all of these languages, the retracted "apico-alveolar" sibilant was opposed to a non-retracted sibilant much like modern English [s], and in many of them, both voiceless and voiced versions of both sounds occurred. A solid type of evidence consists of different spellings used for two different sibilants: in general, the retracted "apico-alveolar" variants were written ?s? or ?ss?, while the non-retracted variants were written ?z?, ?c? or ???. In the Romance languages, the retracted sibilants derived from Latin /s/, /ss/ or /ns/, while the non-retracted sibilants derived from earlier affricates [t?s] and [d?z], which in turn derived from palatalized /k/ or /t/. The situation was similar in High German, where the retracted sibilants derived largely from Proto-Germanic /s/, while the non-retracted sibilants derived from instances of Proto-Germanic /t/ that were shifted by the High German sound shift. Minimal pairs were common in all languages. Examples in Middle High German, for example, were wizzen "to know" (Old English witan, cf. "to wit") vs. wissen "known" (Old English wissen), and wīz "white" (Old English wīt) vs. wīs(e) "way" (Old English wīs, cf. "-wise").

Description of the retracted sibilant

Often, to speakers of languages or dialects that do not have the sound, it is said to have a "whistling" quality, and to sound similar to palato-alveolar ?. For this reason, when borrowed into such languages or represented with non-Latin characters, it is often replaced with [?]. This occurred, for example, in English borrowings from Old French (e.g. push from pousser, cash from caisse); in Polish borrowings from medieval German (e.g. kosztowa? from kosten, ?ur from sūr (contemporary sauer)); and in representations of Mozarabic (an extinct medieval Romance language once spoken in southern Spain) in Arabic characters. The similarity between retracted [s?] and [?] has resulted in many exchanges in Spanish between the sounds, during the medieval period when Spanish had both phonemes. Examples are jabón (formerly xabón) "soap" from Latin sapō/sapōnem, jibia "cuttlefish" (formerly xibia) from Latin sēpia, and tijeras "scissors" (earlier tixeras < medieval tiseras) from Latin cīsōrias (with initial t- due to influence from tōnsor "shaver").

One of the clearest descriptions of this sound is from Obaid: "There is a Castilian s, which is a voiceless, concave, apicoalveolar fricative: The tip of the tongue turned upward forms a narrow opening against the alveoli of the upper incisors. It resembles a faint /?/ and is found throughout much of the northern half of Spain".

Many dialects of Modern Greek have a very similar-sounding sibilant that is pronounced with a laminal articulation.

Loss of the voiceless alveolar sibilant

This distinction has since vanished from most of the languages that once had it in medieval times.

• In most dialects of Spanish, the four alveolar sibilants have merged into the non-retracted [s] (seseo). However, in the Spanish of central and northern Spain, the non-retracted [s] was fronted to [θ] after merging with non-retracted [z], while the retracted [s?] remains (distinción). Distinción is also preserved in Spanish orthography on both sides of the Atlantic.
• In French and most dialects of Portuguese, the four alveolar sibilants have merged into non-retracted [s] and [z], while in European Portuguese, most other Old World Portuguese variants and some recently European-influenced dialects of Brazil all instances of coda [s?], voiced [z?] before voiced consonants, were backed to [?], while in most of Brazilian Portuguese this phenomenon is much rarer, being essentially absent in the dialects that had a greater indigenous and/or non-Portuguese European influence.
• In the remaining dialects of Portuguese, found in northern Portugal, they merged into the retracted [s?] [z?], or, as in Mirandese (which is, however, not a Portuguese dialect, but belongs to Asturian-Leonese), conserved the medieval distinction.
• In German, [s?] was early on voiced to [z?] in prevocalic position. This sound was then fronted to [z], but did not merge with any other sound (except that it was later re-devoiced in some southern dialects). In pre-consonantal and final position, [s?] merged with either [s] or [?]. The rules for these mergers differ between dialects. In Standard German, [?] is used stem-initially and sporadically after ?r?. Especially in Alemannic, every pre-consonantal [s?] became [?].

Loss-causing events

Those languages in which the sound occurs typically did not have a phonological process from which either [s] or [?] appeared, two similar sounds with which ?s?? was eventually confused. In general, older European languages only had a single pronunciation of s.

In Romance languages, [s] was reached from -ti-, -ci-, -ce- ([ti], [ki], [ke]) clusters that eventually became [ts], [tsi], [tse] and later [s], [si], [se] (as in Latin fortia "force", civitas "city", centum "hundred"), while [?] was reached:

• From a [sk] or [ks] cluster in southern Romance, as in Latin miscere > Portuguese mexer "to move", Latin fluxus > Spanish flojo "lax", Latin crescere > Italian crescere "grow", with a different pronunciation.
• from a deaffricated [t?] in Northern France and southern-central Portugal, as in French chat "cat", Portuguese achar "find".

In High German, [s] was reached through a [t] > [ts] > [s] process, as in German Wasser compared to English water. In English, the same process of Romance [ts] > [s] occurred in Norman-imported words, accounting for modern homophones sell and cell. [?] was also reached from a -sk- cluster reduction as in Romance, e.g. Old English spelling asc for modern ash, German schiff and English ship compared to Danish skib.

Exceptions

Standard Modern Greek, which has apical [s?], lacked both processes.

The Germanic-speaking regions that did not have either phenomenon have normally preserved the apical [s?], that is, Icelandic, Dutch and many Scandinavian lects. It is also found in a minority of Low German dialects.

The main Romance language to preserve the sound, Castilian Spanish, is exceptional in that it had both events that produced [s] and [?], and preserved the apical S at the expense of both, that were shifted farther away. Galician, Catalan and Ladino changed only [s].

Reach in ancient times

Because of the widespread medieval distribution, it has been speculated that retracted [s?] was the normal pronunciation in spoken Latin. Certain borrowings suggest that it was not far off from the sh-sound [?], e.g. Aramaic Jeshua > Greek ?ησο?? (Iēso?s) > Latin Jesus, Hebrew Shabbat > Latin sabbatum; but this could also be explained by the lack of a better sound in Latin to represent Semitic ?. It equally well could have been an areal feature inherited from the prehistoric languages of Western Europe, as evidenced by its occurrence in modern Basque.

For the same reasons, it can be speculated that retracted [s?] was the pronunciation of Proto-Germanic s. Its presence in many branches of Indo-European and its presence particularly in the more conservative languages inside each branch (e.g. Icelandic, Spanish), as well as being found in disparate areas, such as the Baltic languages and Greece, suggests it could have ultimately been the main allophone of Proto-Indo-European s, known for ranging from [s] to as far as [?].

[?], but not [s], was developed in Italian. However, where Spanish and Catalan have apical [s?], Italian uses the same laminal [s] that occurs in standard forms of English: evidence, it could be argued, that S was not pronounced apically in Latin. But Neapolitan has a medieval S becoming either [s] or [?] depending on context, much as in European Portuguese, which could attest to the previous existence of [s?] in the Italian Peninsula. The Italian pronunciation as laminal S could also be explained by the presence of [?] but not [s], thus moving the pronunciation of [s?] to the front of the mouth in an attempt to better differentiate between the two sounds.

Voiceless lamino-dental sibilant

A voiceless laminal dental or dentialveolar sibilant contrasts with a voiceless apical alveolar or post-alveolar sibilant in Basque and several languages of California, including Luise?o of the Uto-Aztecan family and Kumeyaay of the Yuman family.

Voiceless alveolar non-sibilant fricative

Voiceless alveolar non-sibilant fricative
θ?
θ?
???
t?
IPA number	130 414
Audio sample
source · help
Encoding
Entity (decimal)	θ?̱
Unicode (hex)	U+03B8?U+0331

Voiceless alveolar approximant
??
IPA number	151 402A
Audio sample
source · help
Encoding
X-SAMPA	r\_0

Voiceless alveolar tapped fricative
???
????
IPA number	124 402A 430
Encoding
Unicode (hex)	U+027E U+031E U+030A

The voiceless alveolar non-sibilant fricative (also known as a "slit" fricative) is a consonantal sound. As the International Phonetic Alphabet does not have separate symbols for the alveolar consonants (the same symbol is used for all coronal places of articulation that are not palatalized), this sound is usually transcribed ?θ??, occasionally ?θ?? (retracted or alveolarized [θ], respectively), ????? (constricted voiceless [?]), or ?t?? (lowered [t]).

Some scholars also posit the voiceless alveolar approximant distinct from the fricative. The approximant may be represented in the IPA as ????.

Few languages also have the voiceless alveolar tapped fricative, which is simply a very brief apical alveolar non-sibilant fricative, with the tongue making the gesture for a tapped stop but not making full contact. This can be indicated in the IPA with the lowering diacritic to show full occlusion did not occur.

Tapped fricatives are occasionally reported in the literature, though these claims are not generally independently confirmed and so remain dubious.

Flapped fricatives are theoretically possible but are not attested.

Features

• Its manner of articulation is fricative, which means it is produced by constricting air flow through a narrow channel at the place of articulation, causing turbulence. However, it does not have the grooved tongue and directed airflow, or the high frequencies, of a sibilant.
• Its place of articulation is alveolar, which means it is articulated with either the tip or the blade of the tongue at the alveolar ridge, termed respectively apical and laminal.
• Its phonation is voiceless, which means it is produced without vibrations of the vocal cords. In some languages the vocal cords are actively separated, so it is always voiceless; in others the cords are lax, so that it may take on the voicing of adjacent sounds.
• It is an oral consonant, which means air is allowed to escape through the mouth only.
• It is a central consonant, which means it is produced by directing the airstream along the center of the tongue, rather than to the sides.
• Its airstream mechanism is pulmonic, which means it is articulated by pushing air solely with the intercostal muscles and abdominal muscles, as in most sounds.

Occurrence

Language		Word	IPA	Meaning	Notes
Afenmai		aru	[a???u]	'hat'	Tapped; tense equivalent of lax /?/.
Dutch	Speakers mainly with coronal /r/	Geert	[?e????t]	'Geert'	One of many possible realizations of /r/; distribution unclear. See Dutch phonology
	?	Nederlanders	[?ne?.d????lɑn.d??θ?]?	'Dutchmen'	Occasional allophone of /s/; after coda [?]. Itself allophone of /r/. See Dutch phonology
Emilian	Bolognese	zidr?n	[θ?i?dr?n]	'lemon'
English	Australian	Italy	[???θ????i?]	'Italy'	Occasional allophone of /t/. See Australian English phonology
	Received Pronunciation		[??θ??li]		Common allophone of /t/.
	Irish				Allophone of /t/. See English phonology
	Scouse
	Newfoundland
	Some American speakers		[????????i]		Tapped; possible allophone of /t/. Can be a voiceless tap [??] or a voiced tap [?] instead. See English phonology
	General American	trap	[?t?????p?]	'trap'	Common allophone of /r/; following /t/ or [t?]. Phonologically interchangeable with /t??-/. Dialectal in English English. See English phonology
	Some English English speakers		[?t??????p]
	New Zealand		[?t????e?p]
Faroese		eiturkoppur	[?ai?t????k???p???]	'spider'	Devoiced approximant allophone of /r/. See Faroese phonology
Icelandic		tú	[θ?u?]?	'you' (≡ thou)	Laminal. See Icelandic phonology
Turkish		bir	[bi???]	'a(n)'	Tapped; word-final allophone of /?/. See Turkish phonology

Voiceless lateral-median fricative

Voiceless alveolar lateral–median fricative
?
θ??
??θ?
??s
Image

Voiceless dental lateral–median fricative
??
θ?
???θ
???s?

The voiceless alveolar non-sibilant fricative (also known as a "lisp" fricative) is a consonantal sound. Consonants is pronounced with simultaneous lateral and central airflow.

Features

• Its manner of articulation is fricative, which means it is produced by constricting air flow through a narrow channel at the place of articulation, causing turbulence. However, it does not have the grooved tongue and directed airflow, or the high frequencies, of a sibilant.
• Its place of articulation is alveolar, which means it is articulated with either the tip or the blade of the tongue at the alveolar ridge, termed respectively apical and laminal.
• Its phonation is voiceless, which means it is produced without vibrations of the vocal cords. In some languages the vocal cords are actively separated, so it is always voiceless; in others the cords are lax, so that it may take on the voicing of adjacent sounds.
• It is an oral consonant, which means air is allowed to escape through the mouth only.
• It is a lateral consonant, which means it is produced by directing the airstream over the sides of the tongue, rather than down the middle.
• Its airstream mechanism is pulmonic, which means it is articulated by pushing air solely with the intercostal muscles and abdominal muscles, as in most sounds.

Occurrence

Language		Word	IPA	Meaning	Notes
Arabic	Al-Rubū?ah dialect	?????	[aθ???ajm]	'anguish'	Classical Arabic *?? and Modern Standard Arabic [d?]
	[dialect missing]	????	[???mi?]	'thirsty'	Classical and Modern Standard Arabic [e?]

See also

• Voiceless corono-dentoalveolar sibilant
• Tongue shape
• Apical consonant
• Laminal consonant
• Index of phonetics articles

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External links

• List of languages with [s] on PHOIBLE
• List of languages with [??] on PHOIBLE