Véronique Delvaux

The Influence of Ambient Speech on Adult Speech Productions through Unintentional Imitation

This paper deals with the influence of ambient speech on individual speech productions. A methodological framework is defined to gather the experimental data necessary to feed computer models simulating self-organisation in phonological systems. Two experiments were carried out. Experiment 1 was run on French native speakers from two regiolects of Belgium: two from Liège and two from Brussels. When exposed to the way of speaking of the other regiolect via loudspeakers, the speakers of one regiolect produced vowels that were significantly different from their typical realisations, and significantly closer to the way of speaking specific of the other regiolect. Experiment 2 achieved a replication of the results for 8 Mons speakers hearing a Liège speaker. A significant part of the imitative effect remained up to 10 min after the end of the exposure to the other regiolect productions. As a whole, the results suggest that: (i) imitation occurs automatically and unintentionally, (ii) the modified realisations leave a memory trace, in which case the mechanism may be better defined as ‘mimesis’ than as ‘imitation’. The potential effects of multiple imitative speech interactions on sound change are discussed in this paper, as well as the implications for a general theory of phonetic implementation and phonetic representation.

The aerodynamics of nasalization in French

Abstract Nasalization in French involves a complex interplay between several phonetic and phonological factors that have been, for the most part, investigated separately over the last 40 years. The present study provides a detailed account of the aerodynamics of French nasalization from eight Belgian French speakers reading word lists. Patterns of tautosyllabic nasal coarticulation are investigated in CV˜, NV˜, CV˜C, CV˜.CV, CV, NV, (C)VN, and NVN items, comparing different vowel and consonant types. Dependent variables involve temporal measures of both the extent of nasalization and its starting point relative to the oral–nasal boundary, and average flow rates across the acoustically defined segments. Results confirm previous findings that carryover nasalization is more extensive than anticipatory nasalization in French for both vowels and consonants. We further show that the temporal extent of intra-syllabic nasal coarticulatory airflow varies across vowel height and consonant manner of articulation and voicing. Various factors are considered in accounting for this variation.

Determination of velum opening for French nasal vowels by magnetic resonance imaging.

MRI techniques have been used to describe velum opening of French vowels. Data based on 18 joined axial slices of 4 mm thickness were recorded with four subjects. Differences in velum opening are calculated from areas measured in the tract between the lowered velum and the back pharynx wall. Results show that for all subjects, the back vowel [symbol: see text] has the smallest opening, while some variations are observed for the other vowels.

Voice outcomes of laryngopharyngeal reflux treatment: a systematic review of 1483 patients

The aim of this study is to explore voice quality modifications in laryngopharyngeal reflux (LPR) disease and to understand better the pathophysiological mechanisms underlying the development of communicative disability. Biological Abstracts, BioMed Central, Cochrane database, PubMed and Scopus were assessed for subject headings using the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-analyses) recommendations. Relevant studies published between January 1990 and December 2015 describing the evaluation of voice quality in LPR disease were retrieved. Issues of clinical relevance, such as LPR diagnosis method, treatment efficacy and outcomes, were evaluated for each study. We determined the grade of recommendation for each publication according to the Oxford Centre for Evidence-Based Medicine evidence levels. The search identified 145 publications, of which 25 studies met the inclusion criteria for a total of 1483 LPR patients. Data were extracted by 2 independent physicians who identified 16 trials with a IIb evidence level, 7 trials with a IIa evidence level and 2 RCTs with a Ib evidence level where 4 patient-based instruments and 5 clinician-based instruments were used. The main voice assessment outcomes reported were hoarseness assessments by physicians or patients, followed by acoustic parameters; 15 and 14 articles, respectively, demonstrated significant improvements in subjective and objective voice assessments after treatment. The methodology used to measure acoustic parameters (i.e. sustained vowel duration, the sample portion choice for measurement, etc.) varied from one study to another. The majority of studies indicated that voice quality assessments (especially acoustic parameters) remain an interesting outcome to measure the effectiveness of treatment, but further studies using standardised and transparent methodology to measure acoustic parameters are necessary to confirm the place of each tool in the LPR disease evaluation.

Role of imitation in the emergence of phonological systems

Abstract The issue we address in this review paper is to what extent mutual adaptation plays a role in the emergence and evolution of phonological systems. Adaptation to the interlocutor has been shown to take many forms and to embrace all the levels of spoken language, from adjustments in vocal intensity to changes in word forms over the course of a conversational exchange, as well as lexical and syntactic alignment across speakers, to name but a few examples. Phonetic convergence, that is, the tendency for two speakers engaged in a conversational exchange to sound more like each other, is one important aspect of between-speaker adaptation. Empirical evidence has recently accumulated that shows that phonetic convergence is a recurrent phenomenon in mature speakers. This phenomenon relies on sensory-motor abilities that infants may already possess at birth. Phonetic convergence affects the way in which both speakers speak after their interaction has ended, and may build up over long periods of time. It may also be a driving mechanism in the acquisition of the phonology and phonetics of a second language. In this paper, (i) we outline the role of imitation in modern speech and language; (ii) we review the evidence provided by experimental and modeling studies for the potential role of imitation in the emergence and evolution of phonological systems; and (iii) we discuss how the resulting hypotheses could be tested in the framework provided by the multi-agent computational COSMO model.

A COMPARISON OF THE ARTICULATORY PARAMETERS INVOLVED IN THE PRODUCTION OF SOUND OF BONOBOS AND MODERN HUMANS

Most studies of vocalizations with chimpanzees and Bonobos focus on the interpretation of the vocal behaviour of both captive and free-ranging groups to relate sounds produced to their semantic contexts. Spectrographic analyses reveal the acoustic structure of the vocalizations but rarely raise the question of the specific articulatory capacities of Bonobos in relation to the acoustics. This point is essential if one wants to understand the articulatory control that Bonobos have on their vocalizations. It is also important when the vocalizations of Bonobos and the sound produced by modern humans are compared.

Change of signs, symptoms and voice quality evaluations throughout a 3- to 6-month empirical treatment for laryngopharyngeal reflux disease

To assess the usefulness of voice quality measurements as a treatment outcome in patients with laryngopharyngeal reflux (LPR)‐related symptoms.

Gender differences in the presentation of dysphonia related to laryngopharyngeal reflux disease: a case-control study

ObjectiveTo investigate the voice quality impairments in patients with laryngopharyngeal reflux (LPR) according to the gender.DesignControlled multi-center study.Materials and methods80 LPR patients (40 males and 40 females) with reflux finding score (RFS) > 7 and reflux symptom index (RSI) > 13 were included and clinically compared according to gender. To be considered as LPR patients, subjects responded to an empiric therapeutic trial based on pantoprazole intake and diet recommendations for 3 months or had positive pH/Impedance metry. Voice Handicap Index (VHI); Short Form Healthy Survey 36 (SF36), blinded Grade, Roughness, Breathiness, Asthenia, Strain and Instability (GRBASI); aerodynamic and acoustic measurements were assessed in all patients and compared with 80 healthy controls (40 males and 40 females) according to gender.ResultsThe most common reasons for the consultation were, respectively, globus sensation in males (22.5%) and dysphonia (27.5%) in female who complained more of breathing difficulties and choking episodes related to LPR than males (p = 0.024). From a quality of life standpoint, female had increased significant impact of LPR disease on vitality and mental health than male. Compared to healthy subjects, both LPR male and female patients had stronger values of G, R, B, S, I, VHI, percent jitter, percent shimmer, and soft palate index than controls. In addition, LPR female had stronger values of lowest fundamental frequency and all aerodynamic measurements than controls.ConclusionAs showed in many other laryngeal conditions, voice quality of female could be more impaired by LPR than male. Some anatomical, histological and functional factors can be suspected and need additional future researches.

Voice quality outcomes of idiopathic Parkinson's disease medical treatment: A systematic review

To investigate voice quality (VQ) impairments in idiopathic Parkinsons disease (IPD) and to explore the impact of medical treatments and L‐Dopa challenge testing on voice.

Voice Quality as Therapeutic Outcome in Laryngopharyngeal Reflux Disease: A Prospective Cohort Study

PURPOSE To study the usefulness of voice quality as therapeutic outcome in laryngopharyngeal reflux disease. MATERIAL AND METHODS A total of 80 patients with reflux finding score (RFS) > 7 and reflux symptom index (RSI) > 13 were treated with pantoprazole, diet, and lifestyle recommendations for 3 months. The therapeutic effectiveness was assessed with RSI; RFS; Voice Handicap Index; blinded Grade, Roughness, Breathiness, Asthenia, Strain, and Instability (GRBASI); aerodynamic and a panel of acoustic measurements before and after treatment. A correlation analysis between symptoms, videolaryngostroboscopic signs, and acoustic measurements was conducted. RESULTS Compared to baseline, means of RSI, RFS, Voice Handicap Index, perceptual dysphonia, and roughness significantly decreased. Significant improvements of phonatory quotient, percent jitter, percent shimmer, Relative Average Perturbation, Pitch Perturbation Quotient, Phonatory F0 Range, Amplitude Perturbation Quotient, smooth Amplitude Perturbation Quotient, and Peak-to-Peak Amplitude Variation were found at the end of treatment. Studies of correlation did not identify relevant correlation between videolaryngostroboscopic signs, especially vocal folds edema, and objective voice quality evaluations. CONCLUSION Voice quality assessments can help to better understand voice disorders and can be used as indicators of the treatment effectiveness in patients with laryngopharyngeal reflux-related symptoms.