Authors:
Felicity Cox, Speech Hearing and Language Research Centre, Macquarie University (Australia)
Sallyanne Palethorpe, Speech Hearing and Language Research Centre, Macquarie University (Australia)
Page (NA) Paper number 417
Abstract:
This paper examines the assumption that Australian English vowel variation
within urban centres is restricted to Broadness variation and is a
consequence of socioeconomic rather than regional factors. The acoustic
structure of vowel realisations for subjects across three different
regions in Sydney is compared to shed some light on the theory of regional
uniformity. 95 adolescent female speakers of General Australian English
produced multiple repetitions of 18 different vowels in the h-d context.
The vowel formants for each group were compared using ANOVA with post-hoc
Bonferroni. Results revealed several significant area effects not necessarily
associated with broadness variation. As area often subsumes a range
of socioeconomic factors, it was necessary to also investigate whether
some other socioeconomic indicator would account for the results. An
examination of parental occupation, education and area confirm area
as the most important of these factors in influencing vowel realisation
for this group of speakers.
Authors:
Catherine Watson, Speech, Hearing, and Language Research Centre, Macquarie University (Australia)
Jonathan Harrington, Speech, Hearing, and Language Research Centre, Macquarie University (Australia)
Sallyanne Palethorpe, Speech, Hearing, and Language Research Centre, Macquarie University (Australia)
Page (NA) Paper number 633
Abstract:
This study presents a kinematic and acoustic comparison of the vowels
spaces of New Zealand English (NZE) and Australian English (AE). Five
talkers of NZE (3F and 2M) and five female talkers of AE each produced
between 9 - 15 tokens of the monophthongs in HEAD, HID,HAD, and HERD.
For each token, measurements of lip aperture, lip protrusion, jaw height,
and tongue height and backness were made, in addition to formants and
vowel duration being calculated. There were three main findgs from
this study. Firstly the widely held view that the NZE HID vowel may
have lowered as it centralised may be incorrect. In this study results
suggest that although the NZE HID vowel is retracted it remains a high
front vowel. The second results is HERD is lip rounded in NZE and AE.
The final finding is that there is no significant difference in vowel
duration between NZE and AE HEAD and HAD, despite NZE HEAD and HAD
being phonetically more raised. The implications of these results are
discussed.
Authors:
Noël Nguyen, Laboratory for Psycholinguistics, University of Geneva (Switzerland)
Sarah Hawkins, Dept.of Linguistics, University of Cambridge (U.K.)
Page (NA) Paper number 539
Abstract:
This study investigates durational and spectral variation in syllable-onset
/l/s dependent on voicing in the coda. 1560 pairs of (C)lVC monosyllables
differing in the voicing of the final stop were read by 4 British English
speakers. Onset /l/ was longer before voiced than voiceless codas,
and darker (for 3 speakers) as measured by F2 frequency and spectral
centre of gravity. Differences due to other variables (lexical status,
isolation/carrier context, syllable onset, vowel quality and regional
accent) are outlined. It is proposed that coda voicing is a feature
associated with the whole syllable, phonetically implemented as a variety
of properties spread throughout the syllabic domain. Implications for
word recognition are outlined.
Authors:
Noël Nguyen, FPSE, University of Geneva (Switzerland)
Alan A. Wrench, Queen Margaret College, Edinburgh (U.K.)
Fiona Gibbon, Queen Margaret College, Edinburgh (U.K.)
William J. Hardcastle, Queen Margaret College, Edinburgh (U.K.)
Page (NA) Paper number 533
Abstract:
Stops are not identified in the same way depending on preceding fricatives.
According to Mann and Repp (1981), such context-dependent variations
in the perception of stops originate from the influence of fricatives
on how stops are produced. This study aimed further to explore this
hypothesis. A first experiment showed that the effect of fricatives
on the identification of stops tends to be confined to the most ambiguous
stimuli, when a large range of acoustic cues to place of stop articulation
is provided to the listener. In a second experiment, articulatory
and acoustic data were gathered in the production of fricative-stop
sequences. Although on the whole consistent with previous findings,
our results indicate that many articulatory dimensions are brought
into play in fricative-stop articulatory patterns, thus making it difficult
to establish a direct link between the articulatory and perceptual
levels.
Authors:
Rob J.J.H. Van Son, University of Amsterdam, Institute of Phonetic Sciences/IFOTT (The Netherlands)
Florien J. Koopmans-van Beinum, University of Amsterdam, Institute of Phonetic Sciences/IFOTT (The Netherlands)
Louis C.W. Pols, University of Amsterdam, Institute of Phonetic Sciences/IFOTT (The Netherlands)
Page (NA) Paper number 203
Abstract:
A large part of the variation in natural speech appears along the dimensions
of articulatory precision / perceptual distinctiveness. We propose
that this variation is the result of an effort to communicate efficiently.
Speaking is considered efficient if the speech sound contains only
the information needed to understand it. This efficiency is tested
by means of a corpus of spontaneous and matched read speech, and syllable
and word frequencies as measures of information content (12007 syllables,
8046 word forms, 1582 intervocalic consonants, and 2540 vowels). It
is indeed found that the duration and spectral reduction of consonants
and vowels correlate with the frequency of syllables and words in this
corpus. Consonant intelligibility correlates with both the acoustic
factors and the syllable and word frequencies. It is concluded that
the principle of efficient communication organizes at least some aspects
of speech production.
Authors:
Inger Karlsson, KTH (Sweden)
Tanja Banziger, FAPSE (Switzerland)
Jana Dankovicova, CULD (U.K.)
Tom Johnstone, FAPSE (Switzerland)
Johan Lindberg, KTH (Sweden)
Haakan Melin, KTH (Sweden)
Francis Nolan, CULD Department of Linguistics, University of Cambridge (U.K.)
K. Scherer, FAPSE Department of Psychology, University of Geneva (Switzerland)
Page (NA) Paper number 737
Abstract:
Some preliminary investigations of within-speaker variations due to
voluntary and induced speaking manners have been performed. The ultimate
aim of the investigations was to suggest methods to take care of within-speaker
variations in automatic speaker verification. Special software was
developed to systematically elicit different types of voluntary and
involuntary speech variations that might realistically occur in every-day
situations. A database containing speech from 50 Swedish male speakers
was collected using this software. Acoustic analyses have been performed
on and the results compared between voluntary and involuntary speech
variations. The acoustic parameters that have been studied included
segment durations, formant frequencies at vowel midpoints, fundamental
frequency and overall amplitude and amplitude in frequency bands.
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