approximants in urdu language - center for language ... in urdu... · urdu language, like korean...
TRANSCRIPT
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Approximants in Urdu Language
Presented by:
Saadia Ambreen
Center of Language EngineeringAl-Khawarizmi Institute of Computer Science
University of Engineering and Technology, Lahore
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Outline
Introduction
Literature Survey
Urdu Approximants
Exceptional cases with [j] approximant
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Introduction
Ladefoged (1964: 25) coined the termApproximant; he used this term in PhoneticStudy of West African Languages.According tohim “approximants have narrow vocal tractbut not narrow enough to result in aturbulent airstream”.
Reetz Jongman(2009) in his book AcousticCharacteristics of Speech Sounds states thatapproximants are weaker and shorter thanvowels and also have longer transitionduration.
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Contd
Ladefoged and Maddieson (1996) definesapproximants as ‘‘vowel-like segments thatfunction as consonants’’.
Forel and Paskas (2005) said thatapproximants are the sounds whichproduced when the tongue approaches theroot of the mouth and due to this frictiondoes not create.
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Literature Survey
English Approximants
According to Forel and Paskas (2005)Southern British English language has threeapproximants [r], [j], [w]. [r] is alveolar andonly occurs before vowels in SouthernBritish English. [j] is palatal and [w] is velarapproximant.
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American English American English has four approximants /w, j,
r,1/ (CarolY. Espy-Wilson 1992).
Phonetically, /l/ has two allophones. /l/ is lightat word initial position. Whereas, at wordfinal position it is always dark.
Glides /w/ /j/ mostly occur at prevocalicposition.
Lip rounding occurs when/r/is prevocalic orintervocalic and before a stressed vowel(Delattre and Freeman, 1968). Due to liprounding all formants of /r/ lowers.
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Sindhi Language
Glides, in Sindhi language has some acousticvowel characteristics like formant structureand periodic wave forms.( Ayaz Keerio et. al2011). This is the reason Glides are alsocalled Semi-vowel.
In Sindhi language, Glides cannot formsyllable individually because they do notform the prominent part of speech signal ina syllable like vowels.
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Contd
In Sindhi language Glides [w] and [j] arevoiced phonemes and voiced region can alsobe seen easily.
Glides show sharp transitory segment inSindhi language.
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Example of Sindhi Glides
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Korean Language
According to C. Kim and A. J. Lotto (2004)Korean language has three approximants [w],[j], [l].
The phoneme [l] is alveolar. In word initialposition, [l] is deleted when it is followed by[i] or change to [n] (Sohn 1999). Word initialposition of loan words and some Koreannames [l] is produced as [r].
[r] is also produced in intervocalic position.At the word final position [l] is produced aslight[l].
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Contd
[w] and [j] are known as glides. Glidesmostly come at prevocalic position inKorean language (C. Kim and A. J. Lotto2004).
[w] phoneme has the same vocal tract ofthe[u] vowel when it comes before [I,e,a,ә]and the glide [j] when comes before thevowels [e,a,u,ә,ɛ,o] has the same vocal tractas of [i].
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Urdu Approximants
Suleman Mazhar (CRULP) worked onAspirated approximants in Urdu language,according to him aspirated approximants arenot part of Urdu dialect now.
Aspirated approximants do not occur wordinitially, might have occurred medially in oldUrdu but now they have changed to theirnon-aspirated counterparts.
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Contd… Khalid. N in his paper “Existence Of [v]
and [w] in Urdu Language” (2002),concluded that the native speakers of Urdudo not distinguish between the use of [v] or[w] in words.
It is also concluded that if freedom is givento pronounce anything from [v] to [w], thespeakers generally tend towards a moreloose pronunciation, somewhere betweenthe approximant [w], the fricative [v], andthe vowel [u].
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Contd…
Urdu language, like Korean language has threeapproximants i.e. [r], [l] and [j]. So /w/ is notpresent in Urdu language. These approximantsalso present at word initially, finally and medially
Unlike, Southern British English [r] approximantin Urdu language produced in every positionlike before vowel, after vowel and it is alsoproduced at intervocalic position.
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[r] Approximant
In Urdu language, [r] approximant can occurat word initially, finally and within the word(word medially).
At word initial position [r] comes at twopositions firstly, [r] preceded with pause andsecondly, [r] preceded without pause.
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Word Initially With Pause
When [r] comes at word initial position andit is preceded with pause then it has fricativefeatures and also has light formants
Intensity is higher at formant position thenfalls when reaches at fricative position.
Duration is longer when [r] is producedbefore long vowel and duration is shorterwhen comes before short vowel or medialvowels.
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Example
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Word Initial Without Pause
When [r] comes at word initial position butpreceded without pause then it has samefeatures as when it comes at intervocalicposition.
When [r] comes at word initial positionwithout preceding pause but preceded wordfinal phoneme is stop then it has longerduration.
Intensity is lower and it has formants butthese formants are lighter than vowels’formants.
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Example
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Word Medial Position
At word medial position [r] comes at two positions i.e.
within two vowels and
within vowel and consonant.
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Within Two Vowels
When [r] approximant comes in intervocalicposition then its duration is very short onlythree to four cycles and does not exceedfrom 0.025 ms.
The formants of the semi vowel are visiblebut become very light and sometimesvanished
Intensity falls slightly but there is a clearchange in wave form of [r] approximant.
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Example
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Within Vowel and Consonant
When [r] approximant produced inbetween consonant and a vowel then thespectrogram shows frication but thewaveforms have clear waves.
Intensity falls and
The duration varies and reached up to0.050ms.
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Example
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Word Finally
At word final position [r] approximant again comes at two positions i.e.
Word final with pause
Word final without pause
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Word Final With Pause
When [r] comes at word final position and itis succeeded with a pause then it takes thefeatures of the preceding vowel.
It has lighter formants as compared to thepreceding vowel and
Intensity started to fall.
Duration reaches up to 0.080ms.
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Example
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Word Final Without Pause
When [r] comes at word final position but itis not succeeded with pause then it hassome light formants. There is also a slightdisjuncture before the formants
Intensity decreases.
Duration reaches up to 0.040ms.
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Example
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[l] Approximant
[l] phoneme is another approximant in UrduLanguage. it also change its shape andfeatures when it comes at different places.Like English language [l] in Urdu languagealso comes at every position like
word initially,
finally and
within the word.
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Word Initial Position
At word initial position [l] approximant occur at two positions:
proceeded with pause
and without pause.
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Without Pause
When it comes at word initially and doesnot preceded with pause then it hasformants similar to the succeeded vowelsbut these formants are lighter than thevowel formants.
Sometimes it has frication before theformants.
Intensity remains same as the succeededvowel.
And duration reaches up to 0.120ms.
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Example
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With Pause
When [l] comes at word initial andproceeded with pause,
Its intensity does not falls but remains thesame as the succeeded vowel.
It has similar formants as of the vowel theseformants are lighter than the vowelformants.
Duration varies and reaches up to 0.155ms.
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Example
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Word Middle Position
[l] approximant take two positions at word medially i.e.
at intervocalic position and
between vowel and consonant.
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Between Vowel and Consonant
When [l] phoneme comes in between voweland consonant, it has frication at the end.
The formants are lighter than the vowelformants but the wave form is completelydifferent from the preceding vowel.
Intensity is higher at the formant level andsuddenly decreases when reaches at fricativeportion.
Duration of [l] phoneme at this position ismore than 0.060ms.
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Example
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Intervocalic Position
When [l] phoneme comes in between twovowels then
The formants are lighter than the vowels’formants.
Intensity rises slightly.
The duration of [l] at intervocalic position is0.070ms,
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Example
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Word Finally
[l] approximant in Urdu language also foundat word final position. At word final positionit occurs at both positions i.e.
Succeeded with pause and
Succeeded without pause
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Succeeded With Pause
When it comes at word final position andsucceeded with pause then:
Its duration more than 150ms and due tothe succeeded pause [l] phoneme lengthens.
Formants are lighter than the precedingvowel.
Intensity does not fall but remain the sameas it is at vowel part but sharply decrease atthe end of [l] approximant.
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Example
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Without Pause
When [l] approximant comes at word finalposition and does not succeeded with pausethen
Its duration is short and ranges between0.060ms to 0.100ms.
Intensity slightly rises and then sharplydecreases as the phoneme ends.
Formants are lighter than the vowelformants.
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Example
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[j] Approximant
The third approximant in Urdu language is[j].
[j] Approximant in Urdu language does notfound at word finally.
It only occurs at word initially and wordmedially.
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Word Initial
At word initial position [j] approximant comes at two position
firstly preceded with pause and
secondly, without preceding with pause.
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Preceded With Pause
[j] approximant when comes at word initialposition and it is preceded with pause thenit has two parts, one is fricative part andsecond part has formants.
At formant part [j] approximant has highintensity as compared to fricative partwhere intensity falls and then again risesgradually when the vowel starts.
Duration is more than 0.100ms.
The formants of [j] approximant is similar tothe formants of [i] vowel.
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Example
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Without Pause
When [j] approximant comes at wordinitially but does not preceded with pausethen
It has the features of fricatives. There isfrication but like fricatives intensity does notfall completely.
Formants of [j] approximants vanishedcompletely.
Duration ranges from 0.070ms to 0.090ms.
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Example
![Page 55: Approximants in Urdu Language - Center for Language ... in Urdu... · Urdu language, like Korean language has three approximants i.e. [r], [l] and [j]. So /w/ is not present in Urdu](https://reader034.vdocuments.us/reader034/viewer/2022052214/5f0523fe7e708231d411789f/html5/thumbnails/55.jpg)
Word Medially
[j] approximant in Urdu language comes only at one position i.e. between two vowels.
![Page 56: Approximants in Urdu Language - Center for Language ... in Urdu... · Urdu language, like Korean language has three approximants i.e. [r], [l] and [j]. So /w/ is not present in Urdu](https://reader034.vdocuments.us/reader034/viewer/2022052214/5f0523fe7e708231d411789f/html5/thumbnails/56.jpg)
Between Two Vowels
When it comes between two vowels then:
Intensity falls
Wave form also changes and
The formants of [j] approximant alsobecome lighter as compared to thesucceeded and preceding vowels.
Duration range is from 0.025ms to 0.100ms.
![Page 57: Approximants in Urdu Language - Center for Language ... in Urdu... · Urdu language, like Korean language has three approximants i.e. [r], [l] and [j]. So /w/ is not present in Urdu](https://reader034.vdocuments.us/reader034/viewer/2022052214/5f0523fe7e708231d411789f/html5/thumbnails/57.jpg)
Example
![Page 58: Approximants in Urdu Language - Center for Language ... in Urdu... · Urdu language, like Korean language has three approximants i.e. [r], [l] and [j]. So /w/ is not present in Urdu](https://reader034.vdocuments.us/reader034/viewer/2022052214/5f0523fe7e708231d411789f/html5/thumbnails/58.jpg)
Exceptions of [j] approximant
Sometimes when [j] approximant comes atword medially and at syllable boundarythen
This [j] is deleted.
The preceded short vowel [ɪ], if present,will change into medial vowel i.e. [ɪ](A_Y_H).
It has dark formants.
Intensity is also high and duration is from0.050ms to 0.105ms.
![Page 59: Approximants in Urdu Language - Center for Language ... in Urdu... · Urdu language, like Korean language has three approximants i.e. [r], [l] and [j]. So /w/ is not present in Urdu](https://reader034.vdocuments.us/reader034/viewer/2022052214/5f0523fe7e708231d411789f/html5/thumbnails/59.jpg)
Example
![Page 60: Approximants in Urdu Language - Center for Language ... in Urdu... · Urdu language, like Korean language has three approximants i.e. [r], [l] and [j]. So /w/ is not present in Urdu](https://reader034.vdocuments.us/reader034/viewer/2022052214/5f0523fe7e708231d411789f/html5/thumbnails/60.jpg)
List of words
Correct Pronunciation
Deleted [J]
D_DARJA_AFAT_D/d̪ərjɑ:ft ̪õ:/
D_DARA_Y_HA_AFAT_D
D_DARJA_A /d̪ərjɑ:/ D_DARA_Y_HA_A
BUNJA_AD_D /bʊnjɑ:d ̪/ BUNA_Y_HA_AD_D
SIJA_ASAT_D /sɪjɑ:sət ̪/ SA_Y_HA_ASAT_D
NAFSIJA_AT_D /nəfsɪjɑ:t ̪ /
NAFSA_Y_HA_AT_D
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References A. Keerio, L.D. Dhomeja, A.A.Shaikh, Y.A.Malkani, Signal & Image Processing :
An International Journal (SIPIJ) Vol.2, No.4, December 2011 DOI : 10.5121/sipij.2011.2409 109
Carol Y. Espy-Wilson (1992), Acoustic Measures For Linguistic Features Distinguishing The Semivowels/Wj R 1/In American English, Electrical, Computer and Systems Engineering Department, Boston University.
Claire-A. Forel & Genoveva Puskás, 1986, PHONETICS AND PHONOLOGY Reader for First Year English Linguistics University of Oldenburg
Delattre, P., and Freeman, D. (1968). "A Dialect Study of American R's by X-ray Motion Picture," Language 44, 29-68.
Espy-Wilson, C. Y. (1989). "The Influence of Selected Acoustic Cues on the Perception of/I/and/w/," J. Acoust. SOc.Am. Suppl. 1 86, S49.
Espy-Wilson, C. Y. (1991). "Consistency in/r/Trajectories in American English," Proc. 12th Int. Cong. Phon. Sei. 4, 370-373.
Kent, R., Carney, P., and Severcid, L. (1974). "Velar Movement and Timing: Evalua,,ion of a Model for Binary Control," J. Speech Hear. Res. 17, 470-488.
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Contd… Ladefoge ,P. & Maddieson . I (1996) The sounds’ of World
Languages. Oxford, UK, Blackwell. Ladefoge ,P. (2001) Vowels and consonants : An Introductin to
the sounds of Languages. Oxford’s IK. Blackwell. Lehiste, I. (I962). "Acoustical Characteristics ofSelected
English Consonants," Reix,rt No. 9, University of Michigan, Communication Sciences Laboratory, Ann Arbor, MI.
M.R.Kimand A.J.Lotto (2004) Acoustic Measurement of Korean Approximants, University of Georgia.
Nauman, K. (2002) Center for Research in Urdu Language Processing, Fast University, Pakistan
Sohn, H.M (1999) the Korean Languages, Cambridge, UK Cambridge University.
Suleman, M. Center for Research in Urdu Language Processing, Fast University, Pakistan
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