Freitas, Diamantino Silva

Teixeira, João Paulo

Biblioteca Digital do IPB

4.4 SPEECH PJWSODY 2UU8 T he aim of this work is to determine in French, through an analysis of the rate sensitivity of vowels ;md coHSOHaHts, how the speech rate is related to t.he prosodic stmetun~ a t tlw infra-syllabic level. We present an a11alysis of the phonemic duration of a one thousand word speed1 <"orpus produced at thwe rates by one speaker with two repetit ions. llesul ts show tha t in French conso11ants as well as vowels are more raLe-sensil.ive whe11 s tressed than when uns l.ressed. This stronger rate sensitivity bears on all syllabic constituents. Still , consonants are less rate-sensitive than voweb ami t his is especially true for the stressed phonemes. \Ve will account for the rate sensitivity of pho11emes with a morphodynamic conception of phonology: where the acoustic substrate controls the pho11emic form. We will see that the perception of speed1 rate is cout.rolh~d by the same parameter which c011trob t he features +/- stressed. JPS4-13 Wednesday 14:00 - 15:30 I Phoneme Dedicated ANN Improves Segmental Duration Model .Joio Paulo Tci:r:cira; flmyan~:a Polutcchnic Institute, Portugal Dirmuml.ino fi'rdtns; J'm·to Uniuer·.~il.y, Po1'l'll!Jrtl The Phoneme Dedicated Artificial Neural Network (PDANN) segmenLal duration model consists of a set of ANNs trained specifically for each phoneme segment in order to avoid miscellaneous influence of (]iffen~nt. typ(~S of phouem(·! segments. Therefow, each ANN is dedicat,(~d to pre(lit:t the durat ion of a specific phoneme segment. Objective and subjective measurements of t he performance of the PDANN model were compared with those of a typical ANN model using the same input features and database. The resnHs indicat(! a slighl., bul. dear, perr.(~pl.ually perceived preference towards the PDANN. JPS4-14 The role of speech rate in p e rceiving speech rhytlun Voll~t~1 · Dellwo; Univer.~ity Col/eye Londo11, UK Wednesday 14:00 - 15:30 I Hmnan listeners eau distinv;uish hotwetm lanv;nages of different rhythmic classe!:i (e.g. stress-and syllable-timed languages). The present study inve:;Ligal.ed the role of speech rat,e in this process. Acoustic data suggests (experiment 1) that speech rate can distinguishes as reliable het.w(~(~n stn~ss- all(! syllahle-tinu~d hmv;uag(·!s as pnwiously proposc~d c:orn~latc !s of spP<!c:h rhyUun (%V, VarcoC and nPVI). Behavioral data showed (experiment ll) thal.lis leners make use of rate clitferenccs when asked to assess rhythmic characteristics of stress- and syllable- timed languages in dt~lexic:alized SJ>P.ech. R(~snlts imply t.hat. speech ratP. is an important a coustic: c:orwhtlc! fnr cross-language speech rhy thm. JPS4-15 Wednesday 14 :00 - 15:30 I Size of rhythm-groups affects the nternory trace of heard words in utterances: Results from a pilot study using evoked potentials Annie C. Gilbm·t; Montn~al Univcr8-il.y, Canada Vit:/.111' J. Bow:lw1·; A1rm/,real Univr~rsily, Crmtula Bonthenia Jcm c; MontJ-eal Un·ive1·sity, Canada 

Phoneme dedicated ANN improves segmental duration model

http://bibliotecadigital.ipb.pt/bitstream/10198/7276/3/SpeechProsody2008.pdf

Phoneme dedicated ANN improves segmental duration model

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