Intonation and Phonation in Young Adults with Down Syndrome

Lee, Mary T.; Thorpe, Jude; Verhoeven, Jo

doi:10.1016/j.jvoice.2007.04.006

Cited by 31 publications

(44 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Individual whole vowels were isolated from the recordings and saved as .wav files. Each file was imported separately into Praat, a program that has been used in previous studies with people with DS [9,10,11,12].…”

Section: Preparation Of Vowels For Acoustic and Visual Analysismentioning

confidence: 99%

“…Additionally, DS voice is often perceived as being atypically breathy and rough [2,7] and low-pitched [2,3,7]. Several studies have investigated voice qualities in adults and children with DS, using automatic measurements of fundamental frequency (f0), jitter (frequency perturbation), shimmer (amplitude variation)) and harmonic-tonoise ratio (additional noise in the harmonic spectrum) [2,5,8,9,10,11,12,13]. Historically, these measures have been used as indicators of atypical phonation, although there is increasing evidence that they are unreliable for pathological voices [14].…”

Section: Introductionmentioning

confidence: 99%

“…Research using such measures has failed to determine the role of phonation in perceived voice qualities in DS populations. Inconclusive and contradictory findings from acoustic measures have led some researchers to suggest that supralaryngeal factors, such as the properties of the vocal tract, may contribute to the characteristic voice qualities more than laryngeal factors [10,15].…”

Section: Introductionmentioning

confidence: 99%

“…Several studies have compared acoustic data to the perceived vocal qualities of people with DS, with conflicting results [9,10,11]. Lee et al [10] analysed the vowels from continuous speech of nine British adults with DS, aged between 17-24 years, and those of typically-developing (TD) controls, matched for age and sex.…”

Section: Introductionmentioning

confidence: 99%

“…Lee et al [10] analysed the vowels from continuous speech of nine British adults with DS, aged between 17-24 years, and those of typically-developing (TD) controls, matched for age and sex. They reported no clear difference between groups in jitter and shimmer values.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Analyses of Sustained Vowels in Down Syndrome (DS): A Case Study Using Spectrograms and Perturbation Data to Investigate Voice Quality in Four Adults With DS

2018

View full text Add to dashboard Cite

Analyses of sustained vowels in Down Syndrome (DS): a case study using spectrograms and perturbation data to investigate voice quality in 4 adults with DS.Objectives. Automatic acoustic measures of voice quality in people with Down Syndrome (DS) do not reliably reflect perceived voice qualities. This study used acoustic data and visual spectral data to investigate the relationship between perceived voice qualities and acoustic measures.Study design. Participants were 4 young adults (2 male, 2 female; mean age 23;8 years) with DS and SevereLearning Disabilities (SLD), at least one of whom had a hearing impairment (HI).Methods. Participants imitated sustained /i/, /u/ and /a/ vowels at pre-determined target pitches within their vocal range. Medial portions of vowels were analysed, using Praat, for Fundamental frequency (f0), HNR, jitter and shimmer. Spectrograms were used to identify the presence and the duration of subharmonics at onset and offset, and mid-vowel. The presence of diplophonia was assessed by auditory evaluation.Results. Perturbation data were highest for /a/ vowels and lowest for /u/ vowels. Intermittent productions of subharmonics were evident in spectrograms, some of which coincided with perceived diplophonia. The incidence, location, duration and intensity of subharmonics differed between the four participants. Conclusions.Although the acoustic data do not clearly indicate atypical phonation, diplophonia and subharmonics reflect nonmodal phonation. The findings suggest that these may contribute to different perceived voice qualities in the study group and that these qualities may result from intermittent involvement of supraglottal structures. Further research is required to confirm the findings in the wider DS population, and to assess the relationships between voice quality, vowel type and physiological measures.

show abstract

Section: Preparation Of Vowels For Acoustic and Visual Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Analyses of Sustained Vowels in Down Syndrome (DS): A Case Study Using Spectrograms and Perturbation Data to Investigate Voice Quality in Four Adults With DS

2018

View full text Add to dashboard Cite

show abstract

Quantitative Messverfahren in der Stimmdiagnostik

Barsties v. Latoszek,

Müller,

Nasr

2024

Diagnostik Und Behandlung in Der Stimmtherapie

View full text Add to dashboard Cite

PRAUTOCAL corpus: a corpus for the study of Down syndrome prosodic aspects

Mancebo

Corrales-Astorgano

Aguilar

et al. 2021

Lang Resources & Evaluation

View full text Add to dashboard Cite

Oral productions of speakers with Down syndrome exhibit special characteristics that have been the target of study for decades. In spite of this attention, the availability of rich resources for its analysis is still scarce. In this paper, we present the definition and compiling procedure of a corpus of semicontrolled oral productions of speakers with Down syndrome that aims to allow the analysis of how these speakers with these speakers produce functional and linguistic aspects of speech. The PRAUTOCAL corpus has been recorded while using a video game for training oral competences. Utterances are related to well defined communicative tasks recorded by both speakers with Down syndrome and typically developing speakers. We present the procedure for human experts to evaluate the recordings and the transcription criteria followed for enriching the utterances of the corpus. PRAUTOCAL permits the analysis of the clear contrast in voice and speech between individuals with Down syndrome and typically developing speakers, taking into account the high heterogeneity of the speech problems characteristic of the syndrome. This material allows the analysis of the speech problems in Down syndrome, with applications to the generation of knowledge that could be used in future works for therapists to prepare specific training or enriching diagnosis regarding possible speech and language disorders.

show abstract

Intonation and Phonation in Young Adults with Down Syndrome

Cited by 31 publications

References 17 publications

Analyses of Sustained Vowels in Down Syndrome (DS): A Case Study Using Spectrograms and Perturbation Data to Investigate Voice Quality in Four Adults With DS

Analyses of Sustained Vowels in Down Syndrome (DS): A Case Study Using Spectrograms and Perturbation Data to Investigate Voice Quality in Four Adults With DS

Quantitative Messverfahren in der Stimmdiagnostik

PRAUTOCAL corpus: a corpus for the study of Down syndrome prosodic aspects

Contact Info

Product

Resources

About