This paper is an acoustic phonetic study of vowels in Sora, a Munda language of the Austroasiatic language family. Descriptions here illustrate that the Sora vowel system has six vowels and provide evidence that Sora disyllables have prominence on the second syllable. While the acoustic categorization of vowels is based on formant frequencies, the presence of prominence on the second syllable is shown through temporal features of vowels, including duration, intensity, and fundamental frequency. Additionally, this paper demonstrates that acoustic categorization of vowels in Sora is better in the prominent syllable than in the non-prominent syllable, providing evidence that syllable prominence and vowel quality are correlated in Sora. These acoustic properties of Sora vowels are discussed in relation to the existing debates on vowels and patterns of syllable prominence in Munda languages of India. In this regard, it is noteworthy that Munda languages, in general, lack instrumental studies, and therefore this paper presents significant findings that are undocumented in other Munda languages. These acoustic studies are supported by exploratory statistical modeling and statistical classification methods.

1.
Anderson
,
G. D. S.
(
2014
). “
Overview of the Munda languages
,” in
The Handbook of Austroasiatic Languages
, Vol.
1
, edited by
M.
Jenny
(
Brill
,
Leiden and Boston
), Chap. 5, pp.
364
414
.
2.
Anderson
,
G. D. S.
, and
Harrison
,
K. D.
(
2008
). “
Sora
,” in
The Munda Languages
, edited by
G. D. S.
Anderson
(
Routledge
,
London
), Chap. 7, pp.
299
380
.
3.
Anderson
,
G. D. S.
, and
Harrison
,
K. D.
(
2011
). “
Sora talking dictionary
,” available at http://sora.talkingdictionary.org (Last viewed 11 February 2020).
4.
Bates
,
D.
,
Mächler
,
M.
,
Bolker
,
B.
, and
Walker
,
S.
(
2015
). “
Fitting linear mixed-effects models using lme4
,”
J. Statist. Software
67
(
1
),
1
48
.
5.
Bhattacharya
,
S.
(
1975
).
Studies in Comparative Munda Linguistics
(
Indian Institute of Advanced Study
,
Simla
).
6.
Boersma
,
P.
, and
Weenink
,
D.
(
2020
). Praat: Doing Phonetics by Computer [Computer program]. Version 6.1.09, retrieved on 26 January 2020 from http://www.praat.org/.
7.
Diehl
,
R. L.
, and
Kluender
,
K. R.
(
1989
). “
On the objects of speech perception
,”
Ecol. Psychol.
1
(
2
),
121
144
.
8.
Donegan
,
P. J.
(
1993
). “
Rhythm and vocalic drift in Munda and Mon-Khmer
,”
Linguist. Tibeto-Burman Area
16
(
1
),
1
43
.
9.
Donegan
,
P. J.
(
2009
). “
Essentials of Sora phonology
,” in
Fourth International Conference on Austroasiatic Linguistics
.
10.
Donegan
,
P. J.
, and
Stampe
,
D.
(
1983
). “
Rhythm and the holistic organization of language structure
,” in
Papers from the Parasession on the Interplay of Phonology, Morphology and Syntax
, edited by
J. F.
Richardson
,
M. L.
Marks
, and
A.
Chukerman
(
Chicago Linguistic Society
,
Chicago
), pp.
337
353
.
11.
Donegan
,
P. J.
, and
Stampe
,
D.
(
2002
). “
South-East Asian features in the Munda languages: Evidence for the analytic-to-synthetic drift of Munda
,” in
Annual Meeting of the Berkeley Linguistics Society
, Vol.
28
, pp.
111
120
.
12.
Donegan
,
P. J.
, and
Stampe
,
D.
(
2004
). “
Rhythm and the synthetic drift of Munda
,” in
The Yearbook of South Asian Languages and Linguistics
, edited by
R.
Singh
(
Mouton de Gruyter
,
Berlin, Germany
), pp.
3
36
.
13.
Fox
,
J.
, and
Weisberg
,
S.
(
2019
).
An R Companion to Applied Regression
, third ed. (
Sage
,
Thousand Oaks, CA
), available at https://socialsciences.mcmaster.ca/jfox/Books/Companion/ (Last viewed 11 February 2020).
14.
Ghosh
,
A.
(
2008
). “
Santali
,” in
The Munda Languages
, edited by
G. D. S.
Anderson
(
Routledge
,
London
), Chap. 2, pp.
11
98
.
15.
Horo
,
L.
(
2017
). “
A phonetic description of Assam Sora
,” Ph.D. dissertation,
Indian Institute of Technology Guwahati
, Guwahati, Assam.
16.
Horo
,
L.
, and
Sarmah
,
P.
(
2015
). “
Acoustic analysis of vowels in Assam Sora
,”
North East Indian Linguist.
7
,
69
88
.
17.
Horo
,
L.
, and
Sarmah
,
P.
(
2017
). “
A synchronic comparison of Orissa Sora and Assam Sora
,” in
International Seminar on Munda Linguistics
.
18.
ISO
(
2007
). “
ISO 639-3:2007, Codes for the Representation of Names of Languages—Part 3: Alpha-3 Code for Comprehensive Coverage of Languages
,” available at https://iso639-3.sil.org/ (Last viewed on 11 February, 2020).
19.
Jenny
,
M.
,
Weber
,
T.
, and
Weymuth
,
R.
(
2014
). “
The Austroasiatic languages: A typological overview
,” in
The Handbook of Austroasiatic Languages
, edited by
J.
Mathias
and
P.
Sidwell
(
Brill
,
Leiden and Boston
), Vol. 1, Chap. 2, pp.
13
143
.
20.
Kuznetsova
,
A.
,
Brockhoff
,
P. B.
, and
Christensen
,
R. H. B.
(
2017
). “
lmerTest package: Tests in linear mixed effects models
,”
J. Stat. Software
82
(
13
),
1
26
.
21.
Lieberman
,
P.
(
1974
). “
A study of prosodic features
,” in
Current Trends in Linguistics
, edited by
T. A.
Sebeok
(
Mouton
,
The Hague
, Paris), Vol. 12, Part 10, pp.
2419
2450
.
22.
Lindblom
,
B.
(
1986
). “
Phonetic universals in vowel systems
,” in
Experimental Phonology
, edited by
J. J.
Ohala
and
J. J.
Jaeger
(
Academic
,
Orlando, FL
), pp.
13
44
.
23.
Lobanov
,
B. M.
(
1971
). “
Classification of Russian vowels spoken by different listeners
,”
J. Acoust. Soc. Am.
49
(
2B
),
606
608
.
24.
Maddieson
,
I.
(
2013
). “
Vowel quality inventories
,” in
The World Atlas of Language Structures Online
, edited by
M. S.
Dryer
and
M.
Haspelmath
(
Max Planck Institute for Evolutionary Anthropology
,
Leipzig, Germany
), available at https://wals.info/chapter/2 (Last viewed 11 February 2020).
25.
McCloy
,
D. R.
(
2016
). “
Package ‘phonR’: Tools for phoneticians and phonologists (version 1.0-7) [computer Program]
,” available at https://cran.r-project.org/web/packages/phonR/index.html (Last viewed September 30, 2019).
26.
Mohanty
,
P.
(
1997
). “
Loss of /o/ in Kui, Sora, and Oriya: A clue for a sub-linguistic area
,”
Lang. Tribal Indig Peoples India: Ethnic Space
8
,
109
119
.
27.
Moseley
,
C.
, ed. (
2010
).
Atlas of the World's Languages in Danger
, 3rd ed. (
UNESCO
,
Paris
).
28.
Pinnow
,
H.-J.
(
1959
).
Attempt at a Historical Phonology of the Kharia Language
(
Otto Harrassowitz
,
Wiesbaden, Germany
), pp. i–xiii +
514
pp.
29.
R Core-Team
. (
2019
). “
R: A language and environment for statistical computing
,” (R Foundation for Statistical Computing, Vienna, Austria), available at http://www.R-project.org/ (Last viewed 11 February 2020).
30.
Ramamurti
,
R. S. G. V.
(
1931
).
A Manual of the Sora (or Savara) Language
(published under the authority of the Director of Public Instruction, Superintendent,
Government Press
,
Madras
).
31.
Ramamurti
,
R. S. G. V.
(
1938
).
Sora-English Dictionary
(
Mittal Publication
,
Delhi
).
32.
Registrar General of India
(
2011
).
Distribution of the 100 Non-Scheduled Languages—India, States and Union Territories—2011 Census
(
Office of the Registrar General and Census Commissioner of India
,
New Delhi
).
33.
Rehberg
,
K.
(
2003
). “
Phonologie des Kharia—Prosodische strukturen und segmentales inventar
,” M.A. dissertation,
Universitat Osnabruck
, Osnabruck.
34.
Sidwell
,
P.
, and
Rau
,
F.
(
2014
). “
Austroasiatic comparative-historical reconstruction: An overview
,” in
The Handbook of Austroasiatic Languages
, edited by
J.
Mathias
and
P.
Sidwell
(
Brill
,
Leiden, The Netherlands
), Vol. 1, Chap. 4, pp.
221
363
.
35.
Stampe
,
D.
(
1965
). “
Recent work in Munda linguistics I
,”
Int. J. Am. Linguist.
31
(
4
),
332
341
.
36.
Van Hoof
,
S.
, and
Verhoeven
,
J.
(
2011
). “
Intrinsic vowel F0, the size of vowel inventories and second language acquisition
,”
J. Phonetics
39
(
2
),
168
177
.
37.
Venables
,
W. N.
, and
Ripley
,
B. D.
(
2002
).
Modern Applied Statistics with S
(
Springer
,
New York
).
38.
Whalen
,
D. H.
, and
Levitt
,
A. G.
(
1995
). “
The universality of intrinsic F0 of vowels
,”
J. Phonetics
23
(
3
),
349
366
.
39.
Williams
,
D.
, and
Escudero
,
P.
(
2014
). “
A cross-dialectal acoustic comparison of vowels in Northern and Southern British English
,”
J. Acoust. Soc. Am.
136
(
5
),
2751
2761
.
40.
Zide
,
A. R.
(
1982
). “
A reconstruction of Proto-Sora-Juray-Gorum phonology
,” Ph.D. thesis,
University of Chicago
, Chicago.
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