41,181 research outputs found

    Second Language Acquisition of Voicing Patterns in Spanish Sibilants

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    In the current study, English-speaking students enrolled in an upper-level university Spanish class read a series of sentences that are designed to elicit alveolar sibilants [s, z] in coda position, both word-internal and word-final. Samples are analyzed using Praat (Boersma & Weenink 2005), and data analysis compares the duration of voicing of each sibilant to the total sibilant duration to determine the percentage of voicing assimilation. Given that voicing assimilation in native Spanish is variable rather than categorical (Romero 1999; Schmidt & Willis 2011; Garcia 2013), a control group of native speakers provides a comparison sample. Given the differences of the /s/ in English and Spanish, results are discussed comparing the production of the /s/ by native English speakers to the production of native Spanish speakers

    Spasmodic dysphonia, perceptual and acoustic analysis: presenting new diagnostic tools

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    In this article, we investigate whether (1) the IINFVo (Impression, Intelligibility, Noise, Fluency and Voicing) perceptual rating scale and (2) the AMPEX (Auditory Model Based Pitch Extractor) acoustical analysis are suitable for evaluating adductor spasmodic dysphonia (AdSD). Voice recordings of 12 patients were analysed. The inter-rater and intra-rater consistency showed highly significant correlations for the IINFVo rating scale, with the exception of the parameter Noise. AMPEX reliably analyses vowels (correlation between PUVF (percentage of frames with unreliable F0/voicing 0.748), running speech (correlation between PVF (percentage of voiced frames)/voicing 0.699) and syllables. Correlations between IINFVo and AMPEX range from 0.608 to 0.818, except for noise. This study indicates that IINFVo and AMPEX could be robust and complementary assessment tools for the evaluation of AdSD. Both the tools provide us with the valuable information about voice quality, stability of F0 (fundamental frequency) and specific dimensions controlling the transitions between voiced and unvoiced segments

    More on the voicing of English obstruents: voicing retention vs. voicing loss

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    In Gonet (2010), one of the present authors found out that English word-final phonologically voiced obstruents in the voicing-favouring environment exhibit asymmetrical, if not erratic, behaviour in that voicing in plosives is most often retained while in fricatives voicing retention concerns only about 1/3 of the cases, with the other possibilities (partial and complete devoicing) occurring in almost equal proportions. The present study is an attempt at exploring the intricacies of devoicing in English to examine to what extent the general tendency towards obstruent devoicing is overridden by voicing retention triggered by adjacent voiced segments both within words and across word boundaries. This study is based on a relatively large knowledge base obtained from recordings of spontaneous R. P. pronunciation

    Child L2 development: a longitudinal case study on voice onset times in word-initial stops

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    This paper reports the results of a longitudinal case study examining the acquisition of the English voice system by a three-year-old native speaker of Dutch. The Study aims to examine whether the child develops two different phonetic systems or uses just one system for both languages, and compares the early L2 acquisition process with L1, simultaneous bilingual and late L2 acquisition. The results reveal that the child successfully acquires the English contrast between short-lag and long-lag stops, but gradually changes the Dutch system, which contrasts prevoiced with short-lag stops, into the direction of the English system

    Production and perception of speaker-specific phonetic detail at word boundaries

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    Experiments show that learning about familiar voices affects speech processing in many tasks. However, most studies focus on isolated phonemes or words and do not explore which phonetic properties are learned about or retained in memory. This work investigated inter-speaker phonetic variation involving word boundaries, and its perceptual consequences. A production experiment found significant variation in the extent to which speakers used a number of acoustic properties to distinguish junctural minimal pairs e.g. 'So he diced them'—'So he'd iced them'. A perception experiment then tested intelligibility in noise of the junctural minimal pairs before and after familiarisation with a particular voice. Subjects who heard the same voice during testing as during the familiarisation period showed significantly more improvement in identification of words and syllable constituents around word boundaries than those who heard different voices. These data support the view that perceptual learning about the particular pronunciations associated with individual speakers helps listeners to identify syllabic structure and the location of word boundaries

    Initial glottalization and final devoicing in polish English

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    This paper presents an acoustic study of the speech of Polish leaners of English. The experiment was concerned with English sequences of the type George often, in which a word-final voiced obstruent was followed by a word-initial vowel. Acoustic measurements indicated the degree to which learners transferred Polish-style glottalization on word-initial vowels into their L2 speech. Temporal parameters associated with the production of final voiced obstruents in English were also measured. The results suggest that initial glottalization may be a contributing factor to final devoicing errors. Adopting English-style ‘liaison’ in which the final obstruent is syllabified as an onset to the initial vowel is argued to be a useful goal for English pronunciation syllabi. The implications of the experiment for phonological theory are also discussed. A hierarchical view of syllabic structures proposed in the Onset Prominence environment allows for the non-arbitrary representation of word boundaries in both Polish and English

    Acoustic cues for the korean stop contrast-dialectal variation

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    In this study, cross-dialectal variation in the use of the acoustic cues of VOT and F0 to mark the laryngeal contrast in Korean stops is examined with Chonnam Korean and Seoul Korean. Prior experimental results (Han & Weitzman, 1970; Hardcastle, 1973; Jun, 1993 &1998; Kim, C., 1965) show that pitch values in the vowel onset following the target stop consonants play a supplementary role to VOT in designating the three contrastive laryngeal categories. F0 contours are determined in part by the intonational system of a language, which raises the question of how the intonational system interacts with phonological contrasts. Intonational difference might be linked to dissimilar patterns in using the complementary acoustic cues of VOT and F0. This hypothesis is tested with 6 Korean speakers, three Seoul Korean and three Chonnam Korean speakers. The results show that Chonnam Korean involves more 3-way VOT and a 2-way distinction in F0 distribution in comparison to Seoul Korean that shows more 3-way F0 distribution and a 2-way VOT distinction. The two acoustic cues are complementary in that one cue is rather faithful in marking 3-way contrast, while the other cue marks the contrast less distinctively. It also seems that these variations are not completely arbitrary, but linked to the phonological characteristics in dialects. Chonnam Korean, in which the initial tonal realization in the accentual phrase is expected to be more salient, tends to minimize the F0 perturbation effect from the preceding consonants by taking more overlaps in F0 distribution. And a 3-way distribution of VOT in Chonnam Korean, as compensation, can be also understood as a durational sensitivity. Without these characteristics, Seoul Korean shows relatively more overlapping distribution in VOT and more 3-way separation in F0 distribution

    Speech Production Patterns Following Management of Velopharyngeal Inadequacy

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    This descriptive study investigated the pattern of speech sound production before and after surgical management of velopharyngeal inadequacy in two subjects. The research questions asked were: (a) What type of speech patterns do subjects referred for surgical management of velopharyngeal incompetence demonstrate presurgically? (b) What changes in the speech patterns of the subjects are observed in the immediate month following surgery for velopharyngeal incompetence? (c) Do these changes settle into a stabilized pattern of speech production by 4 months postsurgery? The subjects\u27 speech productions were audio recorded for analysis using the Broen CVC Probe to obtain imitated single word elicitations at 1 month prior to surgery, 1 month postsurgery, and 4 months postsurgery. The principal investigator transcribed the 2 subjects\u27 Broen CVC results when data collection was completed. Twenty-five percent of the subjects\u27 speech samples were transcribed independently by a second examiner. Inter-rater reliability for phonetic transcription was at . 98 for initial and final phoneme transcription. The subjects\u27 initial and final consonant productions were scored as correct or incorrect according to place, manner, voicing, and diacritic errors. Percentage of error in production was calculated. Error rates were compared over the three data collection periods. Presurgically, Subject #1 \u27s percentage of error for placement, manner, voicing, and diacritics ranged from 0% to 49%. Errors included nasality, partial de-voicing, breathiness, and interdentalization. Error rates 1 month postsurgery ranged from 0% to 38%. Errors included partial de-voicing, hyponasality, and interdentalization. Error rates 4 months postsurgery ranged from 0% to 24%, and included partial de-voicing and interdentalization. Presurgically, percentage of error for Subject #2 in terms of place, manner, voicing, and diacritics ranged from O% to 52 % . Errors included nasality, weak consonant production, and partial de-voicing. One month postsurgery, error rates ranged from 0% to 35% and included hyponasality, excessive aspiration, and partial de-voicing. Four months postsurgery, error rates ranged from 0% to 30%, including partial de-voicing and excessive aspiration. Velopharyngeal competence had improved, as had accuracy of speech productions, but neither subject had achieved normal speech at 4 months postsurgery

    Articulatory insights into language variation and change: preliminary findings from an ultrasound study of derhoticization in Scottish English

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    <p>Scottish English is often cited as a rhotic dialect of English. However, in the 70s and 80s, researchers noticed that postvocalic /r/ was in attrition in Glasgow (Macafee, 1983) and Edinburgh (Romaine, 1978; Johnston and Speitel 1983). Recent research (Stuart-Smith, 2003) confirms that postvocalic /r/ as a canonical phonetically rhotic consonant is being lost in working-class Glaswegian speech. However, auditory and acoustic analysis revealed that the situation was more complicated than simple /r/ vs. zero variation. The derhoticized quality of /r/ seemed to vary socially; in particular male working class speakers often produced intermediate sounds that were difficult to identify. It is clear that although auditory and acoustic analysis are useful, they can only hint at what is going on in the vocal tract. A direct articulatory study is thus motivated.</p> <p>Instrumental phonetic studies that examine the vocal tract during the production of sustained rhotic consonants and in laboratory-based studies of American English /r/ have identified a complex relationship between articulation and acoustics, including articulatory differences with minimal acoustic consequences (starting with Delattre and Freeman, 1968). In other words, different gestural configurations can be used to generate a canonically rhotic consonant. A pilot study (Scobbie and Stuart-Smith, 2006) using Ultrasound Tongue Imaging (UTI) with a Scottish vernacular speaker revealed something rather different: the occurrence of a strong articulatory retroflex tongue motion, which generated little or no rhotic acoustic consequences because it was timed to occur after phonation had ceased, before pause. This tongue motion was found in a speaker who was weakly rhotic. Thus we may have a situation in which acoustic differences with a sociolinguistic function have, in some prosodic contexts, imperceptible articulatory differences in tongue position, though timing will vary. The situation of language variation and change in Scotland means that an articulatory/acoustic study is likely to give very different results to similar studies of rhotic speakers in the USA (Mielke, Twist, and Archangeli, 2006), and be particularly relevant to understanding social variation.</p> <p>Ultrasound is non-invasive and portable and therefore has great potential as an instrumental method for studying aspects of socially stratified variation: articulatory data can be physically collected in every-day social settings. However the technique requires refinement for effective use in recording locations outside the laboratory (e.g. in school, at home), and the potential impact of using the equipment on speech is not known. Gick (2002) suggest methods for fieldwork, but we are not aware of any study which attempts to quantify the effects of the technique on vernacular speakers.</p> <p>Ultrasound is non-invasive and portable and therefore has great potential as an instrumental method for studying aspects of socially stratified variation: articulatory data can be physically collected in every-day social settings. However the technique requires refinement for effective use in recording locations outside the laboratory (e.g. in school, at home), and the potential impact of using the equipment on speech is not known. Gick (2002) suggest methods for fieldwork, but we are not aware of any study which attempts to quantify the effects of the technique on vernacular speakers.</p&gt
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