# Extensions to the International Phonetic Alphabet

The Extensions to the International Phonetic Alphabet for Disordered Speech, commonly abbreviated extIPA /ɛkˈstaɪpə/, are a set of letters and diacritics devised by the International Clinical Phonetics and Linguistics Association to augment the International Phonetic Alphabet for the phonetic transcription of disordered speech. Some of the symbols are used for transcribing features of normal speech in IPA transcription, and are accepted as such by the International Phonetic Association.
Many sounds found only in disordered speech are indicated with diacritics, though an increasing number of dedicated letters are used as well. Special letters are included to transcribe the speech of people with lisps and cleft palates. The extIPA repeats several standard-IPA diacritics that are unfamiliar to most people but transcribe features that are common in disordered speech. These include preaspiration ⟨ʰ◌⟩, linguolabial ⟨◌̼⟩, laminal fricatives [s̻, z̻], and ⟨*⟩ for a sound (segment or feature) with no available symbol (letter or diacritic). The novel transcription ⟨ɹ̈⟩ is used for an English molar-r, as opposed to ⟨ɹ̺⟩ for an apical r; these articulations are indistinguishable in sound and so are rarely identified in non-disordered speech.
Sounds restricted to disordered speech include velopharyngeals, nasal fricatives (a.k.a. nareal fricatives) and some of the percussive consonants. Sounds sometimes found in the world's languages that do not have symbols in the basic IPA include denasals, the sublaminal percussive, palatal and velar lateral fricatives, and fricatives that are simultaneously lateral and sibilant.
ExtIPA was revised and expanded in 2015; the new symbols were added to Unicode in 2021.

## Letters

The non-IPA letters found in the extIPA are listed in the following table. VoQS letters may also be used, as in ⟨ↀ͡r̪͆⟩ for a buccal interdental trill (a raspberry), as VoQS started off as a subset of extIPA.
Several letters and superscript forms were added to Unicode 14 and 15. They are included in the free Gentium Plus and Andika fonts.
| Category | Letter | Superscript and example | Superscript and example | Unicode | Description |
| Lateral | ʪ | 𐞙 | [t𐞙] | U+02AA, U+10799 | Voiceless grooved lateral alveolar fricative, [ɬ͡s] (a laterally lisped /s/, with simultaneous airflow through the sibilant groove in the tongue and across the side of the tongue), intended for a lateral lisp |
| Lateral | ʫ | 𐞚 | [d𐞚] | U+02AB, U+1079A | Voiced grooved lateral alveolar fricative, [ɮ͡z] (a laterally lisped /z/) |
| Lateral | ꞎ | 𐞝 | [ʈ𐞝] | U+A78E, U+1079D | Voiceless retroflex lateral fricative, implicit in standard IPA. |
| Lateral | 𝼅 | 𐞟 | [ɖ𐞟] | U+1DF05, U+1079F | Voiced retroflex lateral fricative, implicit in standard IPA. |
| Lateral | 𝼆 | 𐞡 | [c𐞡] | U+1DF06, U+107A1 | Voiceless palatal lateral fricative. The voiced fricative may be ⟨𝼆̬⟩ or, in standard IPA, ⟨ʎ̝⟩. |
| Lateral | 𝼄 | 𐞜 | [k𐞜] | U+1DF04, U+1079C | Voiceless velar lateral fricative. The voiced fricative may be ⟨𝼄̬⟩ or, in standard IPA, ⟨ʟ̝⟩. |
| Velo­pharyngeal | ʩ | 𐞐 | [s𐞐] | U+02A9, U+10790 | Voiceless velopharyngeal fricative (often occurs with a cleft palate). The voiced fricative is ⟨ʩ̬⟩. |
| Velo­pharyngeal | 𝼀 | 𐞐𐞪 | [s𐞐𐞪] | U+1DF00, (U+10790+107AA) | Voiceless velopharyngeal trill or 'snort'. (Velopharyngeal fricative accompanied by uvular trill. [𝼀] may be equivalent to [ʩ𐞪].) |
| Velo­dorsal | 𝼃 | – | – | U+1DF03 | Voiceless velodorsal plosive. (The old IPA letter for a velar click, ⟨ʞ⟩, was provided for a voiceless velodorsal plosive from 2008 to 2015.) |
| Velo­dorsal | 𝼁 | – | – | U+1DF01 | Voiced velodorsal plosive |
| Velo­dorsal | 𝼇 | – | – | U+1DF07 | Velodorsal nasal |
| Pharyn­geal | ꞯ | – | – | U+A7AF | Voiceless upper-pharyngeal plosive [q˗] or [ʡ̟] |
| Pharyn­geal | 𝼂 | – | – | U+1DF02 | Voiced upper-pharyngeal plosive [ɢ̠] or [ʡ̟̬] |
| Percussive | ʬ | – | – | U+02AC | Bilabial percussive (for lips smacking together; cf. non-percussive [ʬ↓] for lips smacking apart) |
| Percussive | ʭ | – | – | U+02AD | Bidental percussive (gnashing teeth) |
| Percussive | ¡ | ꜞ | [ǃꜞ], [ǂꜞ] | U+00A1, U+A71E | Sublaminal lower-alveolar percussive (tongue slap). Used with letters for alveolar and palatal clicks to indicate clicks with percussive release, or "clucks", [ǃ¡] and [ǂ¡]. |

## Diacritics

The extIPA has explicitly endorsed some rarer uses of regular IPA diacritics, such as [ʰp] for pre-aspiration, and has added some new ones, such as [tʶ] for uvularization. Some of these extIPA diacritics are occasionally used for non-disordered speech, for example for the unusual airstream mechanisms of Damin.
One extension of regular IPA is the use of parentheses around diacritics to indicate partial application of that diacritic: a pair of parentheses around a diacritic indicates that the diacritic only partially applies (in degree or duration), while a single parenthesis at the left or right of the diacritic indicates that the segment is partially affected at its beginning or end. These conventions may be convenient for representing various voice onset times. Phonation diacritics may also be prefixed or suffixed to represent relative timing beyond the segment (pre- and post-voicing etc.). The following are examples; in principle, any IPA or extIPA diacritic may be parenthesized or displaced in this manner.
Partial application of diacritics (examples) :
| s̬᪽ | partial/central voicing of [s] | z̥᪽ ʒ̊᪻ | partial/central devoicing of [z], [ʒ] | subscript: U+1ABD; superscript: 1ABB |
| s̬᫃ | initial voicing | z̥᫃ ʒ̊᫁ | initial devoicing | subscript: U+1AC3; superscript: 1AC1 |
| s̬᫄ | final voicing | z̥᫄ ʒ̊᫂ | final devoicing | subscript: U+1AC4; superscript: 1AC2 |
| z̤᪽ | partial murmuring of [z] | n͊᪻ | partially denasalized [n] |
| Displaced timing (examples) |||||
| ˬz | pre-voiced [z] | zˬ | post-voiced [z] | U+02EC |
| a˷ | [a] with a creaky offglide | p˳ | [p] with extended voicelessness | U+02F7 (˷), U+02F3 (˳) |
The transcriptions for partial voicing and devoicing may be used in either the sense of degrees of voicing or in the sense that the voicing is discontinuous. For the former, both parentheses indicate the sound is mildly (partially) voiced throughout, and single parentheses mean a partial degree of voicing at the beginning or end of the sound. For the latter, both parentheses mean the sound is (de)voiced in the middle, while the single parentheses mean complete (de)voicing at the beginning or end of the sound. The implication is that such voicing or devoicing is atypical of the language being spoken. For example, ⟨z̥⟩ would be used for the usual devoicing or partial devoicing of the language, while ⟨z̥᪽⟩ would indicate that the transcriber found the devoicing to be atypical, as in pathological speech. Similarly, ⟨z̥᫃⟩ would indicate atypical devoicing at the beginning of the segment. However, some authors use the parentheses for typical devoicing in close transcription. For example, the Bardi word aamba 'man', with the usual initial and final devoicing of that language, has been transcribed [ɐ̥͡ɐmbə̥᫄].
Altering the position of a diacritic relative to the letter indicates that the phonation begins before the consonant or vowel does or continues beyond it. The voiceless ring and other phonation diacritics can be used in the same way if needed. For example, ⟨p˳a⟩ indicates that voicelessness continues past the [p], more or less equivalent to ⟨pʰa⟩.
Other extIPA diacritics are:
Airstream mechanism :
| ɬ↓, ə↓ | U+2193 | (after a letter) Ingressive airstream | ʘ↑ | U+2191 | (after a letter) Egressive airstream |
| ↓ | U+2193 | (in isolation) inhalation | ↑ | U+2191 | (in isolation) exhalation |
| Phonation ||||||
| p˭ | U+02ED | Unaspirated | ʰp | U+02B0 | Pre-aspiration |
| Nasalization ||||||
| n͋ | U+034B | (on a nasal letter) Nareal fricative | s͌ or s𐞐 | U+034C or U+10790 | Velopharyngeal friction (especially noisy nasal airstream caused by turbulent airflow through the velopharyngeal port) |
| v͋ | U+034B | (on an oral letter) nasal fricative escape (audible turbulent airflow through the nostrils, as with a nasal lisp) | m͊ | U+034A | Denasal (as with a headcold; complements the nasal diacritic) |
| Articulatory strength ||||||
| f͈, h͈ | U+0348 | Strong articulation (not necessarily fortis); ⟨h͈⟩ may be used for a true glottal fricative | v͉ | U+0349 | Weak articulation (not necessarily lenis) |
| Articulation ||||||
| v͆ | U+0346 | (on a labial letter) Dentolabial | n̪͆ | U+0346 +032A | (on a coronal letter) interdental |
| t͆ | U+0346 | (on a coronal letter) class-3 occlusion (tongue protrudes past upper teeth, as with a severe underbite) | h̪͆ | U+0346 +032A | (on a glottal letter) bidental |
| s͇ | U+0347 | (on a coronal letter) Alveolar | s͍ | U+034D | Labial spreading |
| f͇ | U+0347 | (on a labial letter) labioalveolar (class-2 occlusion, as with a severe overbite) | o͍ | U+034D | (complements the diacritics for rounding – see rounded vowel) |
| s͎ | U+034E | Whistled | s̻ z̻ | U+033B | laminal fricatives (including lowered tongue tip) |
| ɹ̈, ɹ̺ | (as IPA) | bunched-r (molar-r), and apical-r, respectively | s͕, s͔ | U+0355, U+0354 | Offset to the left and right, respectively |
| Timing ||||||
| s͢θ x͢ɕ | U+0362 | Slurred/sliding articulation (a consonantal diphthong, moving from one articulation to another within the time of a single segment) | p\p\p | U+005C | Stutter (reiterated articulation) |
Diacritics may be placed within parentheses as the voicing diacritics are above. For example, ⟨m͊᪻⟩ indicates a partially denasalized [m].
The arrow for sliding articulation was first used for [wɑət̪s̪͢θ] for 'watch' and [z̪͢ðɪpʊə] for 'zipper'. It is most commonly observed in quick changes from the blade to the tip of the tongue (laminal to apical) in plosives and fricatives, such as [t̪͢t] and [t͢θ], or vice versa, but is not limited to that; the consonants may also be labial or dorsal, e.g. [ɸ͢f] and [k͢q].
The slit-grooved distinction of the channel shape of front fricatives may be handled with these diacritics, with for example ⟨s̪ z̪⟩ for grooved (sibilant) dental fricatives, and ⟨θ͇ ð͇⟩ for ungrooved (non-sibilant) aveolar fricatives. This is a common topic in speech pathology, though ⟨s̪ z̪⟩ occur in non-pathological speech in some languages.
Any IPA letter may be used in superscript form as a diacritic, to indicate the onset, release or 'flavor' of another letter. In extIPA, this is provided specifically for the fricative release of a plosive. For example, ⟨k𐞜⟩ is [k] with a lateral-fricative release (similar to the velar lateral affricate [k͜𝼄], but with less frication); ⟨d𐞚⟩ is [d] with lateral-plus-central release. Combining diacritics can be added to superscript diacritics, such as ⟨tʰ̪͆⟩ for [t] with bidental aspiration.
The VoQS (voice-quality symbols) take IPA and extIPA diacritics, as well as several additional diacritics that are potentially available for extIPA transcription. The subscript dot for 'whisper' is sometimes found in IPA transcription, though in IPA the diacritic has also been used for apical-retroflex articulation.

## Prosodic notation and indeterminate sounds

The Extended IPA has adopted bracket notation from conventions transcribing discourse. Parentheses are used to indicate mouthing (silent articulation), as in the common silent sign to hush (ʃːː). Parentheses are also used to indicate silent pauses, for example (...); the length of the pause may be indicated, as in (2.3 sec). A very short (.) may be used to indicate an absence of co-articulation between adjacent segments, for instance [t(.)weɫv̥] rather than [tʷw̥eɫv̥].
Double parentheses indicate that transcription is uncertain because of extraneous noise or speech, as when one person talks over another. As much detail as possible may be included, as in ⸨2 syll.⸩ or ⸨2σ⸩ for two obscured syllables. This is also IPA usage. Sometimes the obscuring noise will be indicated instead, as in ⸨cough⸩ or ⸨knock⸩, as in the illustrative transcription below; this notation may be used for extraneous noise that does not obscure speech, but which the transcriber nonetheless wishes to notate (e.g. because someone says 'excuse me' after coughing, or verbally responds to the knock on the door, and the noise is thus required to understand the speech).
In the extIPA, indistinguishable/unidentifiable sounds are circled rather than placed in single parentheses as in IPA. An empty circle, ◯, is used for an indeterminate segment, ◯ σ an indeterminate syllable, Ⓒ a segment identifiable only as a consonant, etc. Full capital letters, such as C in Ⓒ, are used as wild-cards for certain categories of sounds, and may combine with IPA and extIPA diacritics. For example, ◯ P̥ indicates an undetermined or indeterminate voiceless plosive. Regular IPA and extIPA letters may also be circled to indicate that their identification is uncertain. For example, ⓚ indicates that the segment is judged to probably be [k]. This is effectively a , and may be elongated into an oval for longer strings of symbols. This was illustrated in the 1997 edition of the chart, where the circle was typeset as ( ̲̅) and longer strings as e.g. (a̲̅a̲̅a̲̅). There is no way to typeset this in Unicode that does not require spurious characters between the letters (as here), but it may be graphically approximated with an unused set of brackets, such as ⦇aaa⦈.
Curly brackets with Italian musical terms are used for phonation and prosodic notation, such as [{$_{falsetto}$ ˈhɛlp $_{falsetto}$}] and terms for the tempo and dynamics of connected speech. These are subscripted within a {curly brace} notation to indicate that they are comments on the intervening text. The VoQS conventions use similar notation for voice quality. These may be combined, for example with VoQS ⟨F⟩ for 'falsetto':
    {$_{allegro}$ I {F {$_𝆏$ didn't $_𝆏$} know that F} $_{allegro}$}
or
    [{$_{allegro}$ ə {F {$_𝆏$ dɪn $_𝆏$} nəʊ ðæʔ F} $_{allegro}$}]
Silence :
| ( ) | Silent articulation: (ʃːː) a silent shhh! | Silent articulation: (ʃːː) a silent shhh! | Silent articulation: (ʃːː) a silent shhh! | Silent articulation: (ʃːː) a silent shhh! | Silent articulation: (ʃːː) a silent shhh! | Silent articulation: (ʃːː) a silent shhh! | Silent articulation: (ʃːː) a silent shhh! |
| (.) | Short pause | (..) | Medium pause | (...) | Long pause | (1.2) | 1.2-second pause |
| Prosody ||||||||
| 𝆑 | Loud speech ('forte') | [{$_𝆑$ ˈlaʊd $_𝆑$}] | [{$_𝆑$ ˈlaʊd $_𝆑$}] | 𝆑𝆑 | Louder speech ('fortissimo') | [{$_{𝆑𝆑}$ ˈlaʊdɚ $_{𝆑𝆑}$}] | [{$_{𝆑𝆑}$ ˈlaʊdɚ $_{𝆑𝆑}$}] |
| 𝆏 | Quiet speech ('piano') | [{$_𝆏$ ˈkwaɪət $_𝆏$}] | [{$_𝆏$ ˈkwaɪət $_𝆏$}] | 𝆏𝆏 | Quieter speech ('pianissimo') | [{$_{𝆏𝆏}$ ˈkwaɪətɚ $_{𝆏𝆏}$}] | [{$_{𝆏𝆏}$ ˈkwaɪətɚ $_{𝆏𝆏}$}] |
| allegro | Fast speech | [{$_{allegro}$ ˈfæst $_{allegro}$}] | [{$_{allegro}$ ˈfæst $_{allegro}$}] | lento | Slow speech | [{$_{lento}$ ˈsloʊ $_{lento}$}] | [{$_{lento}$ ˈsloʊ $_{lento}$}] |
| crescendo, rallentando, and other musical terms may also be used. ||||||||
| Extraneous noise; speech obscured by extraneous noise ||||||||
| ⸨ ⸩ | ⸨2σ⸩ two syllables obscured; ⸨cough⸩ a cough | ⸨2σ⸩ two syllables obscured; ⸨cough⸩ a cough | ⸨2σ⸩ two syllables obscured; ⸨cough⸩ a cough | ⸨2σ⸩ two syllables obscured; ⸨cough⸩ a cough | ⸨2σ⸩ two syllables obscured; ⸨cough⸩ a cough | ⸨2σ⸩ two syllables obscured; ⸨cough⸩ a cough | ⸨2σ⸩ two syllables obscured; ⸨cough⸩ a cough |
| Unidentified and partially identified sounds in recordings ||||||||
| ◯ | segment | Ⓒ | consonant | Ⓕ | fricative | Ⓖ | glide/approximant |
| Ⓚ | click | Ⓛ | liquid (or lateral) | Ⓝ | nasal | Ⓟ | plosive |
| Ⓡ | rhotic (or resonant) | Ⓢ | sibilant | Ⓣ | tone/accent/stress | Ⓥ | vowel |

## Chart

Three rows appear in the extIPA chart that do not occur in the IPA chart: "fricative lateral + median" (simultaneous grooved and lateral frication), "fricative nasal" (a.k.a. nareal fricative) and "percussive". A denasal row is added here. Several new columns appear as well, though the linguolabial column is the result of a standard-IPA diacritic. Dorso-velar and velo-dorsal are combined here, as are upper and lower alveolar.
Consonants not appearing on the standard IPA chart :
| | bi- labial | labio- dental | labio- alveolar | dento- labial | bi- dental | linguo- labial | inter- dental | alveolar (lower alveolar) | retro- flex | pala- tal | velar (velo- dorsal) | velo- phary- ngeal | upper phary- ngeal |
| Plosive | | p̪ b̪ | p͇ b͇ | p͆ b͆ | | t̼ d̼ | t̪͆ d̪͆ | | | | (𝼃 𝼁) | | ꞯ 𝼂 |
| Denasal | m͊ | | | | | | | n͊ | ɳ͊ | ɲ͊ | ŋ͊ | | |
| Nasal | | | m͇ | m͆ | | n̼ | n̪͆ | | | | (𝼇) | | |
| Fricative nasal | m̥͋ m͋ | | | | | | | n̥͋ n͋ | ɳ̥͋ ɳ͋ | ɲ̥͋ ɲ͋ | ŋ̥͋ ŋ͋ | | |
| Trill | | | | | | r̼ | r̪͆ | | | | | 𝼀 (ʩ𐞪) | |
| Median fricative | | | f͇ v͇ | f͆ v͆ | h̪͆ ɦ̪͆ | θ̼ ð̼ | θ̪͆ ð̪͆ | θ͇ ð͇ | | | | ʩ ʩ̬ | |
| Lateral fricative | | | | | | ɬ̼ ɮ̼ | ɬ̪͆ ɮ̪͆ | | ꞎ 𝼅 | 𝼆 𝼆̬ | 𝼄 𝼄̬ | | |
| Mediolateral fricative | | | | | | | | ʪ ʫ | | | | | |
| Lateral approximant | | | | | | l̼ | l̪͆ | | | | | | |
| Percussive | ʬ | | | | ʭ | | | (¡) | | | | | |

## Superscript variants

The customary use of superscript IPA letters is formalized in the extIPA, specifically for fricative releases of plosives, as can be seen in the lower-left of the full chart.
Speech pathologists also often use superscripting to indicate that a target sound has not been reached – for example, [ˈtʃɪᵏən] for an instance of the word 'chicken' where the /k/ is incompletely articulated. However, due to the vague meaning of superscripting in the IPA, this is not a convention supported by the ICPLA. An unambiguous transcription would mark the consonant more specifically as weakened ([ˈtʃɪk͉ən]) or silent ([ˈtʃɪ(k)ən]).

## Sample text

A sample transcription of a written text read aloud, using extIPA and Voice Quality Symbols:
[ð\ðːə̤ {V̰ ə\ə\ə V̰} ˈhw̥əɹld ˈkʌp ˈf̆\faɪnəlz əv ˈnaɪntin eəti {↓$_𝑝$ˈtʉ̆$_𝑝$↓} ˌɑɹ ˈh\hɛld ɪn sːp\ˈsːp\ʰeᵊn ˈðɪs jəɹ (3 sec) ð͈ːe wɪl ɪnv\ˈv͈ːɔlv ðə tˢˑ\tʴ̥ (.) {$_𝑝$tʼ\tʼ$_𝑝$} ʩ \ {$_𝑓$ʩ \ ʩ$_𝑓$}\ˈt͈ɒ̆p̚ ˈneʃənz əv ðə ˈwəɹld ɪnˑ ə̰ {$_{𝑝𝑝}$tʰˑəʃ\t̆ʰə\təʃ$_{𝑝𝑝}$}\ˈt͈ʉɹnəmənt ˈlastɪn ˌoʊvər ˈfɔɹ ˈwiks (..) ˈh͈ɛld ə\ ʔat ˈf\fɔɹtin (...) {$_{𝑝𝑝}$V̰ d\d V̰$_{𝑝𝑝}$} \ ˈdɪfɹənt ˈsɛn{↓təɹʐ↓} ɪn ˈspeᵊn (3 sec) ə̰ (.) ˈɔl əv ðə fˑ\f ˈɔl əv ðə ˈfəɹʂt ˈɹaʉnd ˈɡeᵊmz wɪl bi (..) wɪl bi (.) ɪn ðə (.) w̰̆ə̰ː p\pɹəv\ˈvɪnʃəl {$_𝑝$tʼ\tʼ$_𝑝$} \ {$_{𝑝𝑝}$tʼ\tʼ$_{𝑝𝑝}$} (.) tʼ\tʼ (..) {$_{𝑝𝑝}$tʼ\tʼ$_{𝑝𝑝}$} ʩ \ ʩ \ {↓ˈtãʉ̃nz↓} wɪð ðə s͢ːsʼ\sʼ\ˈs{↓ɛmi ˈfaɪnəlz↓} and ˈf\faɪnəlz ˈhɛld ɪn (.) ⸨knock on door⸩ bɑɹsə{$_𝑝$ˈloʊnə and ˈmədɹɪd$_𝑝$}]
Original text: "The World Cup Finals of 1982 are held in Spain this year. They will involve the top nations of the World in a tournament lasting over four weeks, held at fourteen different centers in Spain. All of the first-round games will be in the provincial towns with the semi-finals, and finals held in Barcelona and Madrid."