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Halaman ini mengandung transkripsi fonetik dalam Alfabet Fonetik Internasional (IPA). Untuk bantuan dalam membaca simbol IPA, lihat Bantuan:IPA. Untuk penjelasan perbedaan [ ], / / dan ⟨ ⟩, Lihat IPA § Tanda kurung dan delimitasi transkripsi.

Dalam fonetik, kebulatan vokal ialah bagaimana bibir membulat saat mengucapkan suatu vokal. Ketika suatu vokal bulat diucapkan, bibir akan membentuk bukaan yang bulat, dan vokal takbulat diucapkan dengan bibir yang rileks atau tak membulat. Dalam banyak bahasa, vokal depan cenderung tak bulat, dan vokal belakang cenderung dibulatkan. Namun, dalam beberapa bahasa, misalnya bahasa Prancis, Jerman dan Islandia, membedakan vokal depan yang bulat dan takbulat yang tingginya (tinggi lidah saat mengucapkan) sama, dan bahasa Vietnam distinguishes rounded and unrounded back vowels of the same height membedakan vokal belakang yang bulat dan takbulat yang tingginya juga sama. Ada juga beberapa bahasa yang inventaris vokalnya tak mempunyai pembedaan kebulatan, misalnya bahasa Alekano yang hanya mempunyai vokal takbulat.^[1] Dalam tabel vokal Alfabet Fonetik Internasional (AFI), vokal yang bulat muncul sebelah kanan vokal yang takbulat dan berpasangan dengannya. Diakritik U+0339 ◌̹ combining right half ring below (cincin setengah kanan gabungan di bawah) dapat digunakan untuk pembulatan yang lebih dan diakritik U+031C ◌̜ combining left half ring below (cincin setengah kiri gabungan di bawah) dapat digunakan untuk pembulatan yang kurang. Sehingga, vokal [o̜] mempunyai pembulatan yang kurang daripada vokal [o], dan [o̹] mempunyai pembulatan yang lebih (seperti pada vokal [u]). Diakritik itu juga dapat digunakan pada vokal yang takbulat, misalnya vokal [ɛ̜] diucapkan dengan bibir yang lebih lebar daripada vokal [ɛ], dan vokal [ɯ̹] diucapkan dengan bibir yang kurang lebar daripada vokal[ɯ].^[2]

Jenis pembulatan

Contoh 1

Pembulatan tertonjol

Pembulatan terkempa

Contoh 2

Pembulatan bertonjol

Pembulatan berkempa

Ada dua jenis pembulatan vokal, yaitu: penonjolan/protrusi dan pengempaan/kompresi. Pembulatan tertonjol ialah pembulatan ketika bibir ditonjolkan keluar dan kebulatannya agak terlihat. Sedangkan pembulatan terkempa ialah pembulatan ketika bibir dikempa atau diapit (dirapatkan) tanpa adanya tonjolan keluar, sehingga. That is, in protruded vowels the inner surfaces of the lips form the opening (thus the alternate term endolabial), whereas in compressed vowels it is the margins of the lips which form the opening (thus exolabial). (Catford 1982, hlm. 172) observes that back and central rounded vowels, such as German /o/ and /u/, are typically protruded, whereas front rounded vowels such as German /ø/ and /y/ are typically compressed. Back or central compressed vowels and front protruded vowels are uncommon,^[3] and a contrast between the two types has been found to be phonemic in only one instance.^[4]

There are no dedicated IPA diacritics to represent the distinction, but the superscript IPA letter ⟨◌ᵝ⟩ or ⟨◌ᶹ⟩ can be used for compression^[5] and ⟨◌ʷ⟩ for protrusion. Compressed vowels may be pronounced either with the corners of the mouth drawn in, by some definitions rounded, or with the corners spread and, by the same definitions, unrounded. The distinction may be transcribed ⟨(ʉ)ᵝ uᵝ⟩ vs ⟨(ɨ)ᵝ ɯᵝ⟩ (or ⟨ʉᶹ uᶹ⟩ vs ⟨ɨᶹ ɯᶹ⟩).^[6]

The distinction between protruded [u] and compressed [y] holds for the semivowels [w] and [ɥ] as well as labialization. In Akan, for example, the [ɥ] is compressed, as are labio-palatalized consonants as in Twi [tɕᶣi̘] "Twi" and adwuma [adʑᶣu̘ma] "work", whereas [w] and simply labialized consonants are protruded.^[7] In Japanese, the /w/ is compressed rather than protruded, paralleling the Japanese /u/. The distinction applies marginally to other consonants. In Southern Teke, the sole language reported to have a phonemic /ɱ/, the labiodental sound is "accompanied by strong protrusion of both lips",^[8] whereas the [ɱ] found as an allophone of /m/ before /f, v/ in languages such as English is not protruded, as the lip contacts the teeth along its upper or outer edge. Also, in at least one account of speech acquisition, a child's pronunciation of clown involves a lateral [f] with the upper teeth contacting the upper-outer edge of the lip, but in crown, a non-lateral [f] is pronounced with the teeth contacting the inner surface of the protruded lower lip.^[9]

Some vowels transcribed with rounded IPA letters may not be rounded at all. An example is /ɒ/, the vowel of lot, which in Received Pronunciation has very little if any rounding of the lips. The "throaty" sound of the vowel is instead accomplished with sulcalization, a furrowing of the back of the tongue also found in /ɜː/, the vowel of nurse.^[10]

It is possible to mimic the acoustic effect of rounded vowels by narrowing the cheeks, so-called "cheek rounding", which is inherent in back protruded (but not front compressed) vowels. The technique is used by ventriloquists to mask the visible rounding of back vowels like [u].^[11] It is not clear if it is used by languages with rounded vowels that do not use visible rounding.

Unrounded, compressed and protruded vowels
	Front	Near-front	Central	Near-back	Back
Semivowel	j ɥ ɥʷ		j̈ ɥ̈ ẅ^[12]		ɰ ɰᶹ/wᵝ w
Close	i y yʷ		ɨ ÿ ʉ^[13]		ɯ ɯᶹ/uᵝ u
Near-close		ɪ ʏ ʏʷ	ɪ̈ ʏ̈ ʊ̈	ɯ̽ ɯ̽ᶹ/ʊᵝ ʊ
Close-mid	e ø øʷ		ɘ ø̈ ɵ		ɤ ɤᶹ/oᵝ o
Mid	e̞ ø̞ ø̞ʷ		ə ø̞̈ ɵ̞		ɤ̞ ɤ̞ᶹ/o̞ᵝ o̞
Open-mid	ɛ œ œʷ		ɜ œ̈ ɞ		ʌ ʌᶹ/ɔᵝ ɔ

Of the open-mid vowels, [œʷ] occurs in Swedish and Norwegian. Central [œ̈] and back [ʌᶹ] have not been reported to occur in any language.

Spread and neutral

The lip position of unrounded vowels may be classified into two groups: spread and neutral. Front vowels are usually pronounced with the lips spread, and the spreading becomes more significant as the height of the vowel increases.^[14] Open vowels are often neutral, i.e. neither rounded nor spread, because the open jaw allows for limited rounding or spreading of the lips.^[15] This is reflected in the IPA's definition of the cardinal [a], which is unrounded yet not spread either.^[16]

Roundedness and labialization

Protruded rounding is the vocalic equivalent of consonantal labialization. Thus, rounded vowels and labialized consonants affect one another by phonetic assimilation: Rounded vowels labialize consonants, and labialized consonants round vowels.

In many languages, such effects are minor phonetic detail, but in others, they become significant. For example, in Standard Chinese, the vowel /ɔ/ is pronounced [u̯ɔ] after labial consonants,^{[butuh rujukan]} an allophonic effect that is so important that it is encoded in pinyin transliteration: alveolar /tu̯ɔ˥/ [twɔ́] (多; duō) 'many' vs. labial /pu̯ɔ˥/ [pɔ́] (波; bō) 'wave'. In Vietnamese, the opposite assimilation takes place: velar codas /k/ and /ŋ/ are pronounced as labialized [kʷ] and [ŋʷ] or even labial-velar [kp] and [ŋm], after the rounded vowels /u/ and /o/.^{[butuh rujukan]}

In the Northwest Caucasian languages of the Caucasus and the Sepik languages of Papua New Guinea, historically rounded vowels have become unrounded, with the rounding being taken up by the consonant. Thus, Sepik [ku] and [ko] are phonemically /kwɨ/ and /kwə/.^{[butuh rujukan]}

In the extinct Ubykh, [ku] and [ko] were phonemically /kʷə/ and /kʷa/.^{[butuh rujukan]} A few ancient Indo-European languages like Latin had labiovelar consonants.^[17]

Phonemic roundedness in English

Vowel pairs differentiated by roundedness can be found in some British dialects (such as the Cardiff dialect, Geordie and Port Talbot English) as well as in General South African English. They involve a contrastive pair of close-mid vowels, with the unrounded vowel being either SQUARE /ɛər/ or a monophthongal FACE /eɪ/ and the rounded counterpart being NURSE /ɜːr/. Contrasts based on roundedness are rarely categorical in English and they may be enhanced by additional differences in height, backness or diphthongization.^[18]^[19]^[20]^[21]

FACE, SQUARE and NURSE in some dialects
Accent	Vowel			Notes
Accent	FACE	SQUARE	NURSE	Notes
Cardiff^[22]	[ei]	[eː]	[øː]	SQUARE may be open-mid [ɛː].^[23]
General SAE^[20]	[eɪ]	[eː]	[øː]
Geordie^[21]	[eː]	[ɛː]	[øː]	FACE may be diphthongal [ɪə ~ eɪ], whereas NURSE may be back [ɔː] or unrounded [(ɪː) ~ (ɜː)].^[21]^[24]
Port Talbot^[19]	[eː]	[ɛː]	[øː]	The accent does not feature the pane–pain merger.^[25]

In addition, contemporary Standard Southern British English as well as Western Pennsylvania English contrast STRUT with LOT mostly by rounding. An example of a minimal pairs is nut vs. not. The vowels are open-mid [(ʌ), (ɔ)] in the former dialect and open [(ɑ), (ɒ)] in the latter. In Western Pennsylvania English, the LOT class also includes the THOUGHT class (see cot-caught merger) and the PALM one (see father-bother merger). In addition, LOT may be longer than STRUT due to its being a free vowel: [ɒː]. In SSBE, these are all distinct and LOT is a checked vowel. In Scottish English, the two vowels tend to be realized as [ʌ] and [ɔ], respectively. The latter often includes the THOUGHT class as the cot-caught merger is common in Scotland. If THOUGHT is distinct, it is realized as [ɔ], whereas LOT is lowered to [ɒ] or raised to [o̞]. This means that while nought [nɔʔ] contrasts with nut [nʌʔ] by rounding, not may have a different vowel [nɒʔ ~ no̞ʔ]. In addition, all three vowels are short in Scotland (see Scottish vowel length rule), unless followed by a voiced fricative where THOUGHT (and LOT, if they are merged) is long, as in England.^[26]^[27]^[28]

STRUT, LOT and THOUGHT in some dialects
Accent	Vowel			Notes
Accent	STRUT	LOT	THOUGHT	Notes
Scottish English^[26]	[ʌ]	[(ɔ(ː)) ~ (ɒ) ~ (o̞)]	[ɔ(ː)]	LOT often merges with THOUGHT.
Standard Southern British English^[28]	[ʌ]	[ɔ]	[o̞ː]
Western Pennsylvania English^[27]	[ɑ]	[ɒ(ː)]		The LOT class also includes THOUGHT and PALM.

General South African English is unique among accents of English in that it can feature up to three front rounded vowels, with two of them having unrounded counterparts.^[20]

Long front vowels in General SAE^[29]
Height	Unr. vowel		Rnd. vowel		Notes
Height	lexical set	realization	lexical set	realization	Notes
Close	FLEECE	[iː]	GOOSE	[yː]	GOOSE may be central [ʉː].
Close-mid	SQUARE	[eː]	NURSE	[øː]
Open-mid	(unpaired)		GOAT	[œː]	GOAT may be diphthongal [œɤ̈].

The potential contrast between the close-mid [øː] and the open-mid [œː] is hard to perceive by outsiders, making utterances such as the total onslaught [ðə ˈtœːtl̩ ˈɒnsloːt] sound almost like the turtle onslaught [ðə ˈtøːtl̩ ˈɒnsloːt].^[30]

Notes

^ Deibler (1992).
^ 'Further report on the 1989 Kiel Convention', Journal of the International Phonetic Association 20:2 (December 1990), p. 23.
^ (Sweet 1877) noted that they are less distinctive from unrounded vowels than their counterparts.
^ Japanese has a back compressed [ɯᵝ] rather than protruded [u] (Okada 1999, hlm. 118); Swedish also has a back compressed [ɯᵝ] ⟨o⟩ as well as both front compressed [y] ⟨u⟩ and front protruded [yʷ] ⟨y⟩ (Engstrand 1999, hlm. 141); the front rounded vowels contrast in ruta 'window pane' and ryta 'roar' (Ladefoged & Maddieson 1996, hlm. 292).
^ E.g. ⟨ɨᵝ⟩ in (Flemming 2002, hlm. 83); the IPA Handbook recommends that ⟨ᶹ⟩ "might be used" for "a secondary reduction of the lip opening accompanied by neither protrusion nor velar constriction".
^ Occasionally other symbols may be used, such as protruded ⟨ỿ⟩ ([yʷ]) and compressed ⟨ꝡ⟩ ([ɰᵝ]). To avoid the implication that the superscript represents an off-glide, it might be placed above the base letter: ⟨yᷱ, ɯᷩ⟩. Ladefoged & Maddieson use old IPA ⟨◌̫⟩ for protrusion (w-like labialization without velarization), while (Kelly & Local 1989, hlm. 154) use w ⟨◌ᪿ⟩ for protrusion (e.g. ⟨øᪿ⟩) and a reversed w ⟨◌ᫀ⟩ for compression (e.g. ⟨uᫀ⟩). This recalls an old IPA convention of rounding an unrounded vowel letter like i with a subscript omega, and unrounding a rounded letter like u with a turned omega (Jespersen & Pedersen 1926: 19).
^ Dolphyne (1988).
^ Paulian (1975).
^ Kelly & Local (1989), hlm. 41.
^ Lass (1984), hlm. 124.
^ Sweet (1877), hlm. 14, 20.
^ Pullum & Ladusaw (1996), hlm. 191.
^ Both [ÿ] and [ü] have been mentioned at various times in (International Phonetic Association 1999), without comment on the implied difference in rounding.
^ Westerman & Ward (2015), hlm. 27.
^ Robins (2014), hlm. 90.
^ International Phonetic Association (1999), hlm. 13.
^ Allen (1978).
^ Collins & Mees (1990), hlm. 88, 95.
^ ^a ^b Connolly (1990), hlm. 122–123, 125.
^ ^a ^b ^c Lass (2002).
^ ^a ^b ^c Watt & Allen (2003), hlm. 269.
^ Collins & Mees (1990), hlm. 88, 95–97.
^ Collins & Mees (1990), hlm. 95.
^ Wells (1982), hlm. 375.
^ Connolly (1990), hlm. 122–123.
^ ^a ^b Wells (1982), hlm. 399–403.
^ ^a ^b Labov, Ash & Boberg (2006), hlm. 88–9.
^ ^a ^b Cruttenden (2014), hlm. 122, 126–128, 130.
^ Lass (2002), hlm. 116, 118–119.
^ Lass (2002), hlm. 118.

References

Allen, W. Sidney (1978). Vox Latina: A Guide to the Pronunciation of Classical Latin (edisi ke-2nd). Cambridge University Press. ISBN 0-521-37936-9.
Catford, J. C (1982). Fundamental Problems in Phonetics. Indiana University Press. ISBN 0-25320294-9.
Collins, Beverley; Mees, Inger M. (1990). "The Phonetics of Cardiff English". Dalam Coupland, Nikolas; Thomas, Alan Richard. English in Wales: Diversity, Conflict, and Change. Multilingual Matters Ltd. hlm. 87–103. ISBN 1-85359-032-0.
Connolly, John H. (1990). "Port Talbot English". Dalam Coupland, Nikolas; Thomas, Alan Richard. English in Wales: Diversity, Conflict, and Change. Multilingual Matters Ltd. hlm. 121–129. ISBN 1-85359-032-0.
Cruttenden, Alan (2014). Gimson's Pronunciation of English (edisi ke-8th). Routledge. ISBN 9781444183092.
Deibler, Ellis (1992). "Alekano Organised Phonology Data".
Dolphyne, Florence Abena (1988). The Akan (Twi-Fante) Language: Its Sound Systems and Tonal Structure. Ghana Universities Press. ISBN 9964-3-0159-6.
Engstrand, Olle (1999). "Swedish". Handbook of the International Phonetic Association: A Guide to the Use of the International Phonetic Alphabet. Cambridge University Press. hlm. 140–142. ISBN 0-52163751-1.
Flemming, Edward S. (2002). Auditory Representations in Phonology. Routledge. ISBN 0-81534041-9.
International Phonetic Association (1999). Handbook of the International Phonetic Association: A Guide to the Use of the International Phonetic Alphabet. Cambridge University Press. ISBN 0-52163751-1.
Kelly, John; Local, John (1989). Doing Phonology: Observing, Recording, Interpreting. Manchester University Press. ISBN 0-7190-2894-9.
Labov, William; Ash, Sharon; Boberg, Charles (2006). The Atlas of North American English. Berlin: Mouton-de Gruyter. hlm. 187–208. ISBN 978-3-11-016746-7.
Ladefoged, Peter; Maddieson, Ian (1996). The Sounds of the World's Languages. Oxford: Blackwell. ISBN 0-631-19814-8.
Lass, Roger (1984). Phonology: An Introduction to Basic Concepts. Cambridge University Press. ISBN 0-521-28183-0.
Lass, Roger (2002). "South African English". Dalam Mesthrie, Rajend. Language in South Africa. Cambridge University Press. ISBN 9780521791052.
Okada, Hideo (1999). "Japanese". Handbook of the International Phonetic Association: A Guide to the Use of the International Phonetic Alphabet. Cambridge University Press. hlm. 117–119. ISBN 0-52163751-1.
Paulian, Christiane (1975). "Le Kukuya, langue teke du Congo: phonologie – classes nominales". Bibliothèque de la SELAF. 49–50.
Pullum, Geoffrey K.; Ladusaw, William A. (1996). Phonetic Symbol Guide (edisi ke-2nd). University of Chicago Press. ISBN 0-226-68536-5.
Robins, R. H. (2014). General Linguistics (edisi ke-4th). Routledge. ISBN 978-0-582-29144-7.
Sweet, Henry (1877). A Handbook of Phonetics. Clarendon Press.
Trask, R. L. (1996). A Dictionary of Phonetics and Phonology. Routledge. ISBN 0-415-11260-5.
Watt, Dominic; Allen, William (2003). "Tyneside English". Journal of the International Phonetic Association. 33 (2): 267–271. doi:10.1017/S0025100303001397 .
Templat:Accents of English
Westerman, D.; Ward, Ida C. (2015) [1933]. Practical Phonetics for Students of African Languages. Routledge. ISBN 978-1-138-92604-2.

External links

Definisi kamus endolabial di Wikikamus
Definisi kamus exolabial di Wikikamus
Definisi kamus unrounded di Wikikamus

[FOOTNOTEDeibler1992-1] Deibler (1992).

[2] 'Further report on the 1989 Kiel Convention', Journal of the International Phonetic Association 20:2 (December 1990), p. 23.

[3] (Sweet 1877) noted that they are less distinctive from unrounded vowels than their counterparts.

[4] Japanese has a back compressed [ɯᵝ] rather than protruded [u] (Okada 1999, hlm. 118); Swedish also has a back compressed [ɯᵝ] ⟨o⟩ as well as both front compressed [y] ⟨u⟩ and front protruded [yʷ] ⟨y⟩ (Engstrand 1999, hlm. 141); the front rounded vowels contrast in ruta 'window pane' and ryta 'roar' (Ladefoged & Maddieson 1996, hlm. 292).

[5] E.g. ⟨ɨᵝ⟩ in (Flemming 2002, hlm. 83); the IPA Handbook recommends that ⟨ᶹ⟩ "might be used" for "a secondary reduction of the lip opening accompanied by neither protrusion nor velar constriction".

[6] Occasionally other symbols may be used, such as protruded ⟨ỿ⟩ ([yʷ]) and compressed ⟨ꝡ⟩ ([ɰᵝ]). To avoid the implication that the superscript represents an off-glide, it might be placed above the base letter: ⟨yᷱ, ɯᷩ⟩. Ladefoged & Maddieson use old IPA ⟨◌̫⟩ for protrusion (w-like labialization without velarization), while (Kelly & Local 1989, hlm. 154) use w ⟨◌ᪿ⟩ for protrusion (e.g. ⟨øᪿ⟩) and a reversed w ⟨◌ᫀ⟩ for compression (e.g. ⟨uᫀ⟩). This recalls an old IPA convention of rounding an unrounded vowel letter like i with a subscript omega, and unrounding a rounded letter like u with a turned omega (Jespersen & Pedersen 1926: 19).

[FOOTNOTEDolphyne1988-7] Dolphyne (1988).

[FOOTNOTEPaulian1975-8] Paulian (1975).

[FOOTNOTEKellyLocal198941-9] Kelly & Local (1989), hlm. 41.

[FOOTNOTELass1984124-10] Lass (1984), hlm. 124.

[FOOTNOTESweet187714,_20-11] Sweet (1877), hlm. 14, 20.

[FOOTNOTEPullumLadusaw1996191-12] Pullum & Ladusaw (1996), hlm. 191.

[13] Both [ÿ] and [ü] have been mentioned at various times in (International Phonetic Association 1999), without comment on the implied difference in rounding.

[FOOTNOTEWestermanWard201527-14] Westerman & Ward (2015), hlm. 27.

[FOOTNOTERobins201490-15] Robins (2014), hlm. 90.

[FOOTNOTEInternational_Phonetic_Association199913-16] International Phonetic Association (1999), hlm. 13.

[FOOTNOTEAllen1978-17] Allen (1978).

[FOOTNOTECollinsMees199088,_95-18] Collins & Mees (1990), hlm. 88, 95.

[FOOTNOTEConnolly1990122–123,_125-19] Connolly (1990), hlm. 122–123, 125.

[FOOTNOTELass2002-20] Lass (2002).

[FOOTNOTEWattAllen2003269-21] Watt & Allen (2003), hlm. 269.

[FOOTNOTECollinsMees199088,_95–97-22] Collins & Mees (1990), hlm. 88, 95–97.

[FOOTNOTECollinsMees199095-23] Collins & Mees (1990), hlm. 95.

[FOOTNOTEWells1982375-24] Wells (1982), hlm. 375.

[FOOTNOTEConnolly1990122–123-25] Connolly (1990), hlm. 122–123.

[FOOTNOTEWells1982399–403-26] Wells (1982), hlm. 399–403.

[FOOTNOTELabovAshBoberg200688–9-27] Labov, Ash & Boberg (2006), hlm. 88–9.

[FOOTNOTECruttenden2014122,_126–128,_130-28] Cruttenden (2014), hlm. 122, 126–128, 130.

[FOOTNOTELass2002116,_118–119-29] Lass (2002), hlm. 116, 118–119.

[FOOTNOTELass2002118-30] Lass (2002), hlm. 118.

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