International Phonetic Alphabet

# Overview
The International Phonetic Alphabet (IPA)Template:Ref label is a system of phonetic notation based on the Latin alphabet, devised by the International Phonetic Association as a standardized representation of the sounds of spoken language. The IPA is used by linguists, speech pathologists and therapists, foreign language teachers, singers, actors, lexicographers, and translators.
The IPA is designed to represent only those qualities of speech that are distinctive in spoken language: phonemes, intonation, and the separation of words and syllables. To represent additional qualities of speech such as tooth-gnashing, lisping, and sounds made with a cleft palate, an extended set of symbols called the Extended IPA is commonly used.
As of 2007, there are 107 distinct letters and 56 diacritics and suprasegmentals in the IPA proper. Occasionally symbols are added, removed, or modified by the International Phonetic Association.

# History
In 1886, a group of French and British language teachers, led by the French linguist Paul Passy, formed what would come to be known (from 1897 onwards) as the International Phonetic Association (in French, lAssociation phonetique internationale). The original alphabet was based on a spelling reform for English known as the Romic alphabet, but in order to make it usable for other languages, the values of the symbols were allowed to vary from language to language. For example, the sound Template:IPA (sh in shoe) was originally represented with the letter  in English, but with the letter  in French. However, in 1888, the alphabet was revised so as to be uniform across languages, thus providing the base for all future revisions.
Since its creation, the organization of vowels and consonants in the IPA has remained largely the same. However, the alphabet itself has undergone a few revisions. The IPA Kiel Convention in 1989 made many changes to the earlier 1932 version. A minor revision took place in 1993, with the addition of the mid-central vowel and the removal of symbols for voiceless implosives, and the alphabet was last revised in May 2005, when a symbol for the labiodental flap was added. Apart from the addition and removal of symbols, changes to the IPA have consisted largely in renaming symbols and categories, and modifying typefaces.
Extensions of the alphabet are relatively recent; the Extended IPA was created in 1990 and officially adopted by the International Clinical Phonetics and Linguistics Association in 1994. Also, the VoQS (Voice Quality Symbols) were proposed in 1995 to provide a system for more detailed transcription of voice production.

# Description
The general principle of the IPA is to provide one symbol for each distinctive sound (or speech segment). This means that the IPA does not use letter combinations unless the sound being represented can be regarded as a sequence of two or more sounds.Template:Ref label The IPA also does not usually have separate letters for two sounds if no known language makes a distinction between them (a property known as "selectiveness"),Template:Ref label and it does not use letters that represent multiple sounds, the way  represents the consonant cluster Template:IPA in English. Additionally, in the IPA no letters have sound values that are context-dependent, such as  in English (and most other European languages).
The symbols of the IPA are 107 letters for consonants and vowels, 31 diacritics which further specify those sounds, and 19 suprasegmentals, which indicate such qualities as length, tone, stress, and intonation.Template:Ref label

## Letterforms
The symbols chosen for the IPA are meant to harmonize with the Latin alphabet.Template:Ref label For this reason, most symbols are either Latin or Greek letters, or modifications thereof. However, there are symbols that are neither: for example, the symbol denoting the glottal stop Template:IPA has the form of a "gelded" question mark, and was originally an apostrophe.Template:Ref label Indeed, some symbols, such as that of the voiced pharyngeal fricative Template:IPA, though modified to look more Latin, were inspired by glyphs in other writing systems (in this case, the Arabic letter Template:Rtl-lang, `ain).
Despite its preference for letters that harmonize with the Latin alphabet, the International Phonetic Association has occasionally admitted symbols that do not have this property. For example, prior to 1989, the IPA symbols for click consonants were Template:IPA, Template:IPA, Template:IPA, and Template:IPA, all of which are clearly derived from Latin and Greek letters, as well as punctuation marks. However, except for Template:IPA, none of these symbols was reflective of contemporary practice among Khoisanists (the main users of symbols for click consonants). As a result, they were replaced by the less Latin-like but more widespread symbols Template:IPA, Template:IPA, Template:IPA, Template:IPA, and Template:IPA at the IPA Kiel Convention in 1989.

## Symbols and sounds
The International Phonetic Alphabet has deliberately been based on the letter forms of the Latin alphabet, using as few non-Latin forms as possible. The Association created the IPA so that the sound values of most consonants taken from the Latin alphabet would correspond to international usage. Hence, the letters Template:IPA, Template:IPA, Template:IPA, (hard) Template:IPA, Template:IPA, Template:IPA, Template:IPA, Template:IPA, Template:IPA, (voiceless) Template:IPA, Template:IPA, Template:IPA, and Template:IPA have the values used in English and most other European languages
, and the vowels from the Latin alphabet (Template:IPA, Template:IPA, Template:IPA, Template:IPA, Template:IPA) correspond to the vowels of Italian. Template:IPA is like the vowel in machine, Template:IPA is as in rule, etc.
Symbols derived from the Greek alphabet include Template:IPA, Template:IPA, Template:IPA, Template:IPA, Template:IPA, and Template:IPA. Of these, the only ones that closely correspond to the Greek letters they are derived from are Template:IPA and Template:IPA. Although Template:IPA, Template:IPA, Template:IPA, and Template:IPA denote beta-like, epsilon-like, phi-like, and chi-like sounds, they do not correspond to them exactly. The letter Template:IPA, though visually similar to the Greek vowel letter , upsilon, is actually a consonant.
The sound-values of modifications of Latin letters can usually be derived from those of the original letters. For example, letters with a rightward-facing hook at the bottom represent retroflex consonants; and small capital letters usually represent uvular consonants. Apart from the fact that certain kinds of modification to the shape of a letter generally correspond to certain kinds of modification to the sound represented, there is no way to deduce the sound represented by a symbol from the shape of the symbol (unlike, for example, in Visible Speech).
Beyond the letters themselves, there are a variety of secondary symbols which aid in transcription. Diacritic marks can be combined with IPA letters to transcribe modified phonetic values or secondary articulations. There are also special symbols for suprasegmental features such as stress and tone that are often employed.

# Usage
Although the IPA offers over a hundred symbols for transcribing speech, it is not necessary to use all relevant symbols at the same time; it is possible to transcribe speech with various levels of accuracy. The most accurate kind of phonetic transcription, in which sounds are described in as much detail as the system allows, without any regard for the linguistic significance of the distinctions thus made, is known as narrow transcription. Anything else is termed broad transcription, though "broad" is obviously a relative term. Both kinds of transcriptions are generally enclosed in brackets, but broad transcriptions are sometimes enclosed in slashes instead of brackets.
Broad transcription only distinguishes sounds which are considered different by speakers of a language. Sounds that may be pronounced differently between styles and dialects or depending on neighbouring sounds can be considered the "same" sound in the sense that they are allophones of the same phoneme. When a word is written as phonemes, it is usually enclosed in slashes. For example, the American pronunciation of the English word "little" may be transcribed broadly using the IPA as Template:IPA. This broad transcription merely identifies the separate phonetically relevant components of the word, and does not indicate the variety of corresponding sounds. On the other hand, the narrow transcription (placed between square brackets) specifies the way each sound is pronounced. A more narrow transcription of "little" would be different depending on the way it is said: Template:IPA, Template:IPA, or Template:IPA are just a few possibilities.

## Use in dictionaries
Many British English dictionaries, such as the Oxford Advanced Learner's Dictionary and the Cambridge Advanced Learner's Dictionary, now use the International Phonetic Alphabet to represent the pronunciation of words. However, most American (and some British) volumes use their own conventions supposed to be more intuitive for readers unfamiliar with the IPA. For example, the pronunciation-representation systems in many American dictionaries (such as Merriam-Webster) use "y" for IPA Template:IPA and "sh" for IPA Template:IPA, reflecting common representations of those sounds in written English. (In IPA, Template:IPA represents the sound of the French u (as in tu), and Template:IPA represents the pair of sounds in grass hut.)
One of the benefits of using an alternative to the IPA is the ability to use a single symbol for a sound pronounced differently in different dialects. For example, the American Heritage Dictionary uses o for the vowel in cot (kot) but o for the one in caught (kot). American regional dialects without the caught-cot merger generally pronounce cot like IPA Template:IPA (with an open central unrounded vowel) and cot like IPA Template:IPA (with an open back rounded vowel), whereas those with the merger pronounce the vowels o and o the same way (for example, like IPA Template:IPA in the Boston dialect). Using one symbol for the vowel in cot (instead of having different symbols for different pronunciations of the o) enables the dictionary to provide meaningful pronunciations for speakers of most dialects of English.
The IPA is also not universal among dictionaries in other countries and languages. Mass-market Czech multilingual dictionaries, for instance, tend to use the IPA only for sounds not found in the Czech language.

## Educational initiative
There is some interest in using native speakers to produce sound and video files of sufficient breadth to completely demonstrate all the speech sounds covered by the IPA. Such a project would encompass a large subset of the world's languages. This would aid linguistic and anthropologic research, as well as help teach language learning. Specifically, the development of a reference standard using the IPA (mirroring the idea of the Rosetta Stone) could be used in order to preserve intact examples of the sounds of human language. For education, the IPA can help standardize resources which prepare students and very young children (ages 6-36 months) for universal language acquisition through familiarization and subsequent imitation of the breadth of human speech sounds.  Research by Flege, Mackay and Piske (2002) and Sebastian-Galles, Echeverria and Bosch (2005) have shown that early exposure to extra phonetic sounds and uses improves later comprehension and pronunciation (accent).

## Use in orthographies and capital variants
IPA symbols have been incorporated into the standard orthographies of various languages, notably in Subsaharan Africa but in other regions as well. These include for example: Hausa; Fula; Akan; Gbe languages; and Manding languages.
An example of capital letter forms for IPA symbols is Kabiye of northern Togo, which has Template:Unicode (capital Template:IPA). Other IPA-paired capitals include Template:Unicode.
The abovementioned and other capital forms are supported by Unicode, but appear in Latin ranges other than the IPA extensions.

# Letters
The International Phonetic Alphabet divides its letter symbols into three categories: pulmonic consonants, non-pulmonic consonants, and vowels. Each character is assigned a number, to prevent confusion between similar letters (such as Template:IPA and Template:IPA), for example in printing manuscripts. Different categories of sounds are assigned different ranges of numbers.

## Consonants (pulmonic)
A pulmonic consonant is a consonant made by obstructing the glottis (the space between the vocal cords) or oral cavity (the mouth) and either simultaneously or subsequently letting out air from the lungs. Pulmonic consonants make up the majority of consonants in the IPA, as well as in human language. All consonants in the English language fall into this category.
The pulmonic consonant table, which includes most consonants, is arranged in rows that designate manner of articulation, meaning how the consonant is produced, and columns that designate place of articulation, meaning where in the vocal tract the consonant is produced. The main chart includes only consonants with a single place of articulation.
- Asterisks (*) mark reported sounds that do not (yet) have official IPA symbols. See the respective articles for ad hoc symbols found in the literature.
- Daggers () mark IPA symbols that do not yet have official Unicode support. Since May 2005, this is the case of the labiodental flap, symbolized by a right-hook v: Labiodental flap. In the meantime the similarly shaped izhitsa (Template:IPA) is used here.
- In rows where some symbols appear in pairs (the obstruents), the symbol to the right represents a voiced consonant (except breathy-voiced Template:IPA). However, Template:IPA cannot be voiced. In the other rows (the sonorants), the single symbol represents a voiced consonant.
- Although there is a single symbol for the coronal places of articulation for all consonants but fricatives, when dealing with a particular language, the symbols are treated as specifically alveolar, post-alveolar, etc., as appropriate for that language.
- Shaded areas indicate articulations judged to be impossible.
- The symbols Template:IPA represent either voiced fricatives or approximants.
- It is primarily the shape of the tongue rather than its position that distinguishes the fricatives Template:IPA, Template:IPA, and Template:IPA.

### Coarticulation
Coarticulated consonants are sounds that involve two simultaneous places of articulation (are pronounced using two parts of the vocal tract). In English, the  in "went" is a coarticulated consonant, because it is pronounced by rounding the lips and raising the back of the tongue. Other languages, such as French and Swedish, have different coarticulated consonants.
- Template:IPA is described as a "simultaneous Template:IPA and Template:IPA". However, this analysis is disputed. (See voiceless palatal-velar fricative for discussion.)

### Affricates and double articulation
Affricates and doubly articulated stops are represented by two symbols joined by a tie bar, either above or below the symbols. The six most common affricates are optionally represented by ligatures, though this is no longer official IPA usage, due to the great number of ligatures that would be required to represent all affricates this way. Alternatively, a superscript notation for a consonant release is sometimes used to transcribe affricates, for example Template:IPA for Template:IPA, paralleling Template:IPA ~ Template:IPA. The symbols for the palatal plosives, Template:IPA are often used as a convenience for Template:IPA or similar affricates, even in official IPA publications, so they must be interpreted with care.
- If your browser uses Arial Unicode MS to display IPA characters, the following incorrectly formed sequences may look better due to a bug in that font: Template:IPA.

## Consonants (non-pulmonic)
Non-pulmonic consonants are sounds which are made without the lungs. These include clicks (found in the Khoisan languages of Africa) and implosives (found in languages such as Swahili).
- Clicks are double articulated and have traditionally been described as having a forward 'release' and a rear 'accompaniment', with the click letters representing the release. Therefore all clicks would require two letters for proper notation: Template:IPA etc., or Template:IPA. When the dorsal articulation is omitted, a Template:IPA may usually be assumed. However, recent research disputes the concept of 'accompaniment'. In such approaches, the click letter represents both articulations, there is no velar-uvular distinction, and the accompanying letter represents the manner of the click: Template:IPA etc.
- Symbols for the voiceless implosives Template:IPA are no longer supported by the IPA, though they remain in Unicode. Instead, the IPA uses the voiced equivalent with a voiceless diacritic: Template:IPA, etc.
- Although not confirmed from any language, and therefore not explicitly recognized by the IPA, a retroflex implosive, Template:Unicode, is supported in the Unicode Phonetic Extensions Supplement, added in version 4.1 of the Unicode Standard, or can be created as a composite Template:IPA.
- The ejective symbol is often substituted for a superscript glottal stop in glottalized but pulmonic sonorants, such as Template:IPA. These may also be transcribed as creaky Template:IPA.

## Vowels
The IPA defines a vowel as a sound which occurs at a syllable center. Below is a chart depicting the vowels of the IPA. The IPA maps the vowels according to the position of the tongue.
The vertical axis of the chart is mapped by vowel height. Vowels pronounced with the tongue lowered are at the bottom, and vowels pronounced with the tongue raised are at the top. For example, Template:IPA (said as the "a" in "palm") is at the bottom because the tongue is lowered in this position. However, Template:IPA (said as the vowel in "meet") is at the top because the sound is said with the tongue raised to the roof of the mouth.
In a similar fashion, the horizontal axis of the chart is determined by vowel backness. Vowels with the tongue moved towards the front of the mouth (such as Template:IPA, the vowel in "met") are to the left in the chart, while those in which it is moved to the back (such as Template:IPA, the vowel in "but") are placed to the right in the chart.
In places where vowels are paired, the right represents a rounded vowel (in which the lips are rounded) while the left is its unrounded counterpart.
- View the vowel chart as an image
- Template:IPA officially represents a front vowel, but there is little distinction between front and central open vowels, and Template:IPA is frequently used for an open central vowel.
- Template:IPA and Template:IPA were written as Template:IPA and Template:IPA respectively in older versions of the IPA.

# Diacritics
Diacritics are small markings which are placed around the IPA letter in order to show a certain alteration or more specific description in the letter's pronunciation. Sub-diacritics (markings normally placed below a letter or symbol) may be placed above a symbol having a descender (informally called a tail), e.g. Template:IPA.
The dotless i, , is used when the dot would interfere with the diacritic. Other IPA symbols may appear as diacritics to represent phonetic detail: Template:IPA (fricative release), Template:IPA (breathy voice), Template:IPA (glottal onset), Template:Unicode (epenthetic schwa), oTemplate:IPA (diphthongization). More advanced diacritics were developed in the Extended IPA for more specific pronunciation encoding.
The state of the glottis can be finely transcribed with diacritics. A series of alveolar plosives ranging from an open to a closed glottis phonation are:

# Suprasegmentals
These symbols describe the features of a language above the level of individual consonants and vowels, such as prosody, tone, length, and stress, which often operate on syllables, words, or phrases: that is, elements such as the intensity, pitch, and gemination of the sounds of a language, as well as the rhythm and intonation of speech. Although most of these symbols indicate distinctions that are phonemic at the word level, symbols also exist for intonation on a level greater than that of the word.

# Obsolete symbols and nonstandard symbols
The IPA inherited alternate symbols from various traditions, but eventually settled on one for each sound. The other symbols are now considered obsolete. An example is Template:IPA which has been standardised to Template:IPA. Several symbols indicating secondary articulation have been dropped altogether, with the idea that such things should be indicated with diacritics: Template:IPA for Template:IPA is one. In addition, the rare voiceless implosive series Template:IPA has been dropped; they are now written Template:IPA respectively.
There are also unsupported or ad hoc symbols from local traditions that find their way into publications that otherwise use the standard IPA. This is especially common with affricates such as Template:IPA for Template:IPA (the "tl" in "Nahuatl").

## IPA extensions
The Extended IPA, also often abbreviated as extIPA, is a group of symbols whose original purpose was to accurately transcribe disordered speech. At the IPA Kiel Convention in 1989, a group of linguists drew up the initial set of symbols for the Extended IPA. The Extended IPA was first published in 1990, and modified over the next few years before its official publication in the Journal of the International Phonetic Association in 1994 allowed it to be officially adopted by the ICPLA. While its original purpose was to transcribe disordered speech, linguists have used it to designate a number of unique sounds within standard communication, such as hushing, gnashing teeth, and smacking lips. The Extended IPA has also been used to record certain peculiarities in an individual's voice, such as nasalized voicing.
Aside from the extIPA, another set of symbols is used for voice quality (VoQS), such as whispering.

# Sounds that have no symbols in the IPA
The remaining blank cells on the IPA chart can be filled without too much difficulty if the need arises. Some ad hoc symbols have appeared in the literature, for example for the retroflex lateral flap and the voiceless lateral fricative series, the epiglottal trill, and the labiodental plosives. (See the grey symbols in the PDF chart.) Diacritics can supply much of the remainder, which would indeed be appropriate if the sounds were allophones.

## Consonants without letters
Consonant sounds are created by adding diacritics to letters with similar sound values. The Spanish bilabial approximant is commonly written as a lowered fricative, Template:IPA. Similarly, voiced lateral fricatives would be written as raised lateral approximants, Template:IPA. A few languages such as Banda have a bilabial flap as the preferred allophone of what is elsewhere a labiodental flap. Similarly, a labiodental trill would be written Template:IPA (bilabial trill and the dental sign). Other taps can be written as extra-short plosives or laterals, e.g. Template:IPA, though in some cases the diacritic would need to be written below the letter. A retroflex trill can be written as a retracted Template:IPA, just as retroflex fricatives sometimes are. The remaining consonants, the uvular laterals and the palatal trill, while not strictly impossible, are very difficult to pronounce and are unlikely to occur even as allophones in the world's languages.

## Vowels without letters
The vowels are similarly manageable by using diacritics for raising, lowering, fronting, backing, centering, and mid-centering. For example, the unrounded equivalent of Template:IPA can be transcribed as mid-centered Template:IPA, and the rounded equivalent of Template:IPA as raised Template:IPA. True mid vowels are lowered Template:IPA, while centered Template:IPA and Template:IPA are near-close and open central vowels, respectively. The only known vowels that cannot be represented in this scheme are the compressed vowels, which would require a dedicated diacritic, such as Template:IPA.

# Symbol names
An IPA symbol is often distinguished from the sound it is intended to represent since there is not a one-to-one correspondence between symbol and sound in broad transcription. While the Handbook of the International Phonetic Association states that no official names exist for symbols, it admits the presence of one or two common names for each character that are commonly used. The symbols also have nonce names in the Unicode standard. In some cases, the Unicode names and the IPA names do not agree. For example, IPA calls Template:IPA "epsilon", but Unicode calls it "small letter open E".
The traditional names of the Latin and Greek letters are usually used for unmodified symbols.Template:Ref label Letters which are not directly derived from these alphabets, such as Template:IPA, may have a variety of names, sometimes based on the appearance of the symbol, and sometimes based on the sound that it represents. In Unicode, some of the symbols of Greek origin have Latin forms for use in IPA; the others use the symbols from the Greek section.
For diacritics, there are two methods of naming. For traditional diacritics, the IPA uses the name of the symbol from a certain language, for example, Template:IPA is acute, based on the name of the symbol in English and French. In non-traditional diacritics, the IPA often names a symbol according to an object it resembles, as Template:IPA is called bridge.

# ASCII transliterations, IPA influence on other phonetic alphabets
Since the IPA uses symbols that are outside the ASCII character set, several systems have been developed that map the IPA symbols to ASCII characters. Notable systems include Kirshenbaum, SAMPA, and X-SAMPA. The usage of mapping systems in on-line text has to some extent been adopted in the context input methods, allowing convenient keying of IPA characters that would be otherwise unavailable on standard keyboard layouts.