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Advanced and retracted tongue root

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Title: Advanced and retracted tongue root  
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Subject: History of the International Phonetic Alphabet, Luo dialect, Vowels, RTR, Tenseness
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Advanced and retracted tongue root

Advanced tongue root (ATR)
◌̘
IPA number 417
Retracted tongue root (RTR)
◌̙
IPA number 418

In phonetics, advanced tongue root and retracted tongue root, abbreviated ATR or RTR, are contrasting states of the root of the tongue during the pronunciation of vowels in some languages, especially in West and East Africa, but also in Kazakh and Mongolian. It has in the past been suggested that this may also be the basis for the distinction between tense and lax vowels in European languages such as German, but this no longer seems tenable.

Contents

  • Advanced tongue root 1
  • Retracted tongue root 2
  • Tongue root position and vowel harmony 3
  • Tongue root and phonation 4
  • See also 5
  • Additional images 6
  • References 7

Advanced tongue root

Advanced tongue root, abbreviated ATR or +ATR, also called expanded, involves the expansion of the pharyngeal cavity by moving the base of the tongue forward — and often lowering the larynx — during the pronunciation of a vowel. The lowering of the larynx sometimes adds a breathy quality to the vowel.

Voiced stops such as [b], [d], [g] can often involve non-contrastive tongue root advancement, whose results can occasionally be seen in sound changes relating stop voicing and vowel frontness: e.g. voicing of stop consonants before front vowels in the Oghuz Turkic languages, or in Adjarian's law: the fronting of vowels after voiced stops in certain dialects of Armenian.[1]

True uvular consonants appear to be incompatible with advanced tongue root, i.e. [–ATR]. Combined with the above-mentioned tendency for voiced stops to be [+ATR], this motivates the extreme rarity of the voiced uvular stop [ɢ] compared to its voiceless counterpart [q].[1]

The International Phonetic Alphabet represents ATR with a "left tack" diacritic, [ ̘ ].

In languages where they occur, advanced-tongue-root vowels very often contrast with retracted tongue root (RTR) vowels in a system of vowel harmony. This occurs commonly in large parts of West Africa and East Africa.

ATR vowels involve a certain tension in the tongue, and often in the lips and jaw as well; the ear can often perceive this tension as a "brightness" (narrow formants) compared to RTR vowels. Nonetheless, phoneticians do not refer to ATR vowels as tense vowels, since the word tense already has several meanings in European phonetics.

Retracted tongue root

Retracted tongue root, abbreviated RTR, is the retraction of the base of the tongue in the pharynx during the pronunciation of a vowel, the opposite articulation of advanced tongue root. In this case it is in effect partial pharyngealization, although it may also contrast with full pharyngealization.

The neutral position of the tongue during the pronunciation of a vowel, contrasting with advanced tongue root and thus marked -ATR, is also sometimes referred to as retracted tongue root.

The diacritic for RTR in the International Phonetic Alphabet is the right tack, [ ̙ ].

RTR vowels are often called "lax", but this is not consistent between languages or even between vowels in the same language.

Tongue root position and vowel harmony

As mentioned above, many African languages, such as Maasai, have systems of vowel harmony based on tongue root position. This is illustrated here with the Fante dialect of Akan, which has fifteen vowels: five +ATR vowels, five −ATR vowels, and five nasal vowels.

Fante ±ATR vowels
Ortho-
graphy
+ATR
value
−ATR
value
Approx. European
equivalent
i /i̘/ [i]
e /e̘/ /i/ [e], [ɪ]
ɛ /e/ [ɛ]
a /a̘/ /a/ [æ], [ɑ]
ɔ /o/ [ɔ]
o /o̘/ /u/ [o], [ʊ]
u /u̘/ [u]

There are two harmonization rules that govern which vowels may co-occur in a word:

  1. All −ATR vowels become +ATR when followed by a peripheral +ATR vowel (/i̘ a̘ u̘/). That is, orthographic e ɛ a ɔ o become i e a o u before i u and sometimes before a.
  2. As long as it does not conflict with the previous rule, the +ATR mid vowels (/e̘ o̘/) become −ATR high vowels (/i u/) when preceded by a −ATR non-high vowel (/e a o/). (This is not reflected in the orthography, for underlying and surface vowels are both spelled e o.)

In the Twi language, the ±ATR distinction has merged in the low vowel, so that /a/ is harmonically neutral, occurring with either set of vowels. In addition, the two vowels written e (/e̘/ and /i/) and o (/o̘/ and /u/) are often not distinguished, being approximately equivalent to European [e] and [o], as reflected in the orthography; for such people the second harmonization rule does not apply.[2]

Tongue root and phonation

With advances in fiber-optic laryngoscopy at the end of the twentieth century, new types of phonation were discovered, which involve more of the larynx than just the glottis. One of the few languages studied thus far, the Togolese language Kabiyé, has a vocalic distinction that had been assumed to be one of tongue root. However, it turned out to be a phonation distinction of faucalized voice versus harsh voice.[3]

It is not yet clear whether this is characteristic of ±ATR distinctions in general.

Root of tongue

See also

Additional images

References

  1. ^ a b Vaux, Bert (1999). "A Note on Pharyngeal Features". Harvard Working Papers in Linguistics. 
  2. ^ J.E. Redden and N. Owusu (1963, 1995). Twi Basic Course. Foreign Service Institute (Hippocrene reprint).
  3. ^ Edmondson, Jerold A.; John H. Esling (2005). The valves of the throat and their functioning in tone, vocal register, and stress: laryngoscopic case studies. 
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