81 research outputs found
The phonological development of adult Japanese learners of English : a longitudinal study of perception and production.
SIGLEAvailable from British Library Document Supply Centre-DSC:DXN042757 / BLDSC - British Library Document Supply CentreGBUnited Kingdo
The phonetics of labialized velars in Ancient Greek
This thesis investigates conditioned sound changes of Proto-Indo-European labialized velars *kw, *gw, and *gwh to labials, coronals, and velars in Ancient Greek. Acoustic and perceptual experiments in British English and Western Zapotec provide typological evidence to inform conclusions regarding the phonetic inception of the sound changes.
Before back vowels and consonants PIE labialized velars became labials in Ancient Greek. Two competing hypotheses have been proposed for these sound changes: perceptual confusion, in which e.g. *kw developed to /p/ via misperception due to acoustic similarity between the two stops (Ohala, 1989, 1993); and incremental articulatory change, in which e.g. *kw gradually developed to /kp/ and then /p/ (Whatmough, 1937; Garrett & Johnson, 2013). The acoustic studies here found little acoustic or perceptual similarity between /kw/ and /p/ in any vocalic environment, indicating that the latter explanation is more plausible.
Before front vowels PIE labialized velars became coronals. Philologists have proposed developmental pathways involving processes of incremental palatalization. This thesis finds evidence for coarticulatory fronting of the velar articulation of labialized velars in front vowel environments, but the effect is language-specific and its auditory prominence depends upon the durational overlap of the primary and secondary articulations. Increased auditory prominence of coarticulatory fronting in mid vowel environments may explain divergent developments of *gwh in Greek to labials before front vowels and to coronals before front mid vowels.
Before the back round vowel /u/ the PIE labialized velars lost contrastive labialization in Greek. The acoustic and perceptual experiments support a perceptual reanalysis account, in which contrastive secondary labialization of the velar is reinterpreted as coarticulatory rounding adjacent to a rounded vowel
Phonetics and phonology of the three-way laryngeal contrast in Madurese
Madurese, a Western Malayo-Polynesian language spoken on the Indonesian island
of Madura, exhibits a three-way laryngeal contrast distinguishing between voiced,
voiceless unaspirated and voiceless aspirated stops and an unusual consonant-vowel
(CV) co-occurrence restriction. The CV co-occurrence restriction is of phonological
interest given the patterning of voiceless aspirated stops with voiced stops rather than
with voiceless unaspirated stops, raising the question of what phonological feature
they may share. Two features have been linked with the CV co-occurrence
restriction: Advanced Tongue Root [ATR] and Lowered Larynx [LL]. However, as
no evidence of voicing during closure for aspirated stops is observed and no other
acoustic measures except voice onset time (VOT), fundamental frequency (F0),
frequencies of the first (F1) and the second (F2) formants and closure duration
relating to the proposed features have been conducted, it remains an open question
which acoustic properties are shared by voiced and aspirated stops.
Three main questions are addressed in the thesis. The first question is what acoustic
properties voiced and voiceless aspirated stops share to the exclusion of voiceless
unaspirated stops. The second question is whether [ATR] or [LL] accounts for the
patterning together of voiceless aspirated stops with voiced stops. The third question
is what the implications of the results are for a transparent phonetics-phonology
mapping that expects phonological features to have phonetic correlates associated
with them. In order to answer the questions, we looked into VOT, closure duration,
F0, F1, F2 and a number of spectral measures, i.e. H1*-A1*, H1*-A2*, H1*-A3*,
H1*-H2*, H2*-H4* and CPP. We recorded fifteen speakers of Madurese (8 females,
7 males) reading 188 disyllabic Madurese words embedded in a sentence frame.
The results show that the three-way voicing categories in Madurese have different
VOT values. The difference in VOT is robust between voiced stops on the one hand
and voiceless unaspirated and voiceless aspirated stops on the other. Albeit
statistically significant, the difference in VOT values between voiceless unaspirated
and voiceless aspirated stops is relatively small. With regard to closure duration, we
found that there is a difference between voiced stops on the one hand and voiceless
unaspirated and aspirated stops on the other. We also found that female speakers
distinguish F0 for the three categories while male speakers distinguish between F0
for voiced stops on the one hand and voiceless unaspirated and voiceless aspirated
stops on the other. The results for spectral measures show that there are no
significant differences in H1*-A1*, H1*-A3*, H1*-H2*, H2*-H4* and CPP between
vowels adjacent to voiced and voiceless aspirated stops. In contrast, there are
significant differences in these measures between vowels adjacent to voiced and
voiceless unaspirated stops and between vowels adjacent to voiceless aspirated and
voiceless unaspirated stops.
Regarding the question whether voiced and voiceless aspirated stops share certain
acoustic properties, our findings show that they do. The acoustic properties they
share are H1*-A1* for both genders, H1*-H2* for females, H1*-A3* and H2*-H4*
for males, and CPP for females at vowel onset and for males at vowel midpoint.
However, they do not share such acoustic properties as VOT, closure duration and
F0. Voiceless unaspirated and voiceless aspirated stops can be distinguished by
VOT, F0 and spectral measures, i.e. H1*-A1*, H1*-A3*, H1*-H2*, H2*-H4* and
CPP. However, these two voiceless stop categories have similar closure durations.
As regards the question if [+ATR] or [+LL] might be responsible for the patterning
together of voiceless aspirated stops with voiced stops, our findings suggest that
either feature appears to be plausible. Acoustic evidence that lends support to the
feature [+ATR] includes lower F1 and greater spectral tilt measures, i.e. H1*-A1*,
H1*-A3*, H1*-H2* and H2*-H4*, and lower CPP values. Acoustic evidence that
supports the feature [+LL] includes lower F1 and greater spectral tilt measures, i.e.
H1*-A1*, H1*-A3*, H1*-H2* and H2*-H4*, and lower CPP values. However, the
fact that voiceless aspirated stops are voiceless during closure raises a problem for
the feature [+ATR] and the fact that F0 for voiceless aspirated stops is higher than
for voiced stops also presents a problem for the feature [+LL].
The fact that not all acoustic measures fit in well with either feature is problematic to
the idea that the relationship between phonetics and phonology is transparent in the
sense that phonological features can be directly transformed into their phonetic
correlates. Following the view that not all phonological features may not be expected
to be phonetically grounded, for example, when they are related to historical sound
change, we hold the idea of a phonetics-phonology mapping which allows for other
non-phonetic factors to account for a phonological phenomenon. We also provide
historical and loanword evidence which could support that voiceless aspirated stops
in Madurese may have derived from earlier voiced stops, which probably retain their
historical laryngeal contrast through phonologisation
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