Consonant and Vowel Duration in Parkinsonian French Speech (original) (raw)
Related papers
2007
The current study compared vowel and consonant duration in speech read by 10 French Parkinsonian speakers and 10 control speakers. The results show a different impact of Parkinson’s disease (PD) on speech segments. Consonants were shortened in PD speech while vowels were significantly longer. This results from the concomitance of articulatory movements of reduced amplitude of articulatory movements and orofacial bradykinesia. As a consequence syllabic productions are of the same overall duration in PD speech as in normal speech. The durational contrast of consonants was maintained, although for vowels there was less agreement with the normal pattern of intrinsic durations, especially for high vowels. 1.
Final Lengthening in Parkinsonian French Speech
2008
The ensuing study examined the impact of Parkinson disease (PD) on the duration of CV syllables in different positions within phrases and the distribution of final lengthening (FL) on syllable subcomponents. Two main tendenciess emerged:1) PD patients produced normal FL and 2) FL effects can be attributed primarily to vowels. These findings suggest that PD speakers had no difficulty with FL and that there is a progressive lengthening across the subconstituents of the final syllable. More fundamentally, these results indicate that the syntactic function of prosody is intact in PD patients at least at the early and mild stages of the disease.
Syllable structure, syllable duration and final lengthening in Parkinsonian French speech
Journal of Multilingual Communication Disorders, 2006
The present study investigates the duration of syllables with relation to position within phrases and the pattern of segment omissions within syllables in a text read by 12 French PD patients and 12 French control subjects. Three main tendencies emerged. The first was similar duration of syllables in PD and control speech, which may result from a combination of articulatory undershoot and slowness of speech gestures. The second was a normal incidence of segment omissions in both groups: these were mostly coda consonants and/or the second member of C1C2 sequences. The third was a normal production and a strong correlation of final lengthening with the syntactic structure of sentences in both PD speech and control speech. Having analysed the results the study evaluates their implication with respect to the role of basal ganglia in the production of speech.
Parkinson’s disease and the effect of lexical factors on vowel articulation
The Journal of the Acoustical Society of America, 2008
Lexical factors (ie, word frequency and phonological neighborhood density) influence speech perception and production. It is unknown if these factors are affected by Parkinson's disease (PD). Ten men with PD and ten healthy men read CVC words (varying orthogonally for word frequency and density) aloud while audio recorded. Acoustic analysis was performed on duration and Bark-scaled F1-F2 values of the vowels contained in the words. Vowel space was larger for low-frequency words from dense neighborhoods than from ...
The Journal of the Acoustical Society of America, 2013
The purpose of this study was to analyze vowel articulation across various speaking tasks in a group of 20 early Parkinson's disease (PD) individuals prior to pharmacotherapy. Vowels were extracted from sustained phonation, sentence repetition, reading passage, and monologue. Acoustic analysis was based upon measures of the first (F1) and second (F2) formant of the vowels /a/, /i/, and /u/, vowel space area (VSA), F2i/F2u and vowel articulation index (VAI). Parkinsonian speakers manifested abnormalities in vowel articulation across F2u, VSA, F2i/F2u, and VAI in all speaking tasks except sustained phonation, compared to 15 age-matched healthy control participants. Findings suggest that sustained phonation is an inappropriate task to investigate vowel articulation in early PD. In contrast, monologue was the most sensitive in differentiating between controls and PD patients, with classification accuracy up to 80%. Measurements of vowel articulation were able to capture even minor abnormalities in speech of PD patients with no perceptible dysarthria. In conclusion, impaired vowel articulation may be considered as a possible early marker of PD. A certain type of speaking task can exert significant influence on vowel articulation. Specifically, complex tasks such as monologue are more likely to elicit articulatory deficits in parkinsonian speech, compared to other speaking tasks.
University of Groningen Prosodic Changes in the Speech of a Single Speaker with Parkinson's Disease
2019
This contribution describes our research into how Parkinson’s Disease (PD) impacts the production and perception of speech. We performed a longitudinal study, making a time series of monthly recordings of the same individual with PD over a year. To determine if the change in prosody would be noticeable both on production and perception levels, we performed acoustic analysis of prosodic features and a perceptual experiment with short phrases taken from the recordings as stimuli. The results of the acoustic analysis showed a decline in f0 variation towards the end of the time period. The results of the perceptual experiment demonstrated that listeners rated the later recordings as less healthy relative to the earlier ones. Listeners’ experience with speech disorders influenced the trend, which was more pronounced for the experienced listeners compared to the listeners with no prior experience with speech disorders.
Speech Rhythm in Parkinson's disease. A study on Italian
Experimental studies on different languages have shown that neurogenetic disorders connected with Parkinson's disease (PD) determine a series of variations in the speech rhythm. This study aims at verifying whether the speech of PD patients presents rhythmic abnormalities compared to healthy speakers also in Italian. The read speech of 15 healthy speakers and of 11 patients with mild PD was segmented in consonantal and vocalic portions. After extracting the durations of all segments, the vowel percentage (%V) and the interval between two consecutive vowel onset points (VtoV) were calculated. The results show that %V has significantly different values in mildly affected patients as compared to controls. For Italian, %V spans between 44% and 50% for healthy subjects and between 51% and 58% for PD subjects. A positive correlation was found between %V and the number of years of PD since its insurgence. The correlation with the age at which the disease insurges is weak. With regard to VtoV, PD subjects do not speak at a significantly slower rate than healthy controls, though a trend in this direction was found. The data suggest that %V could be used as a more reliable parameter for the early diagnosis of PD than speech rate.
Prosodic Changes in the Speech of a Single Speaker with Parkinson's Disease
2019
This contribution describes our research into how Parkinson’s Disease (PD) impacts the production and perception of speech. We performed a longitudinal study, making a time series of monthly recordings of the same individual with PD over a year. To determine if the change in prosody would be noticeable both on production and perception levels, we performed acoustic analysis of prosodic features and a perceptual experiment with short phrases taken from the recordings as stimuli. The results of the acoustic analysis showed a decline in f0 variation towards the end of the time period. The results of the perceptual experiment demonstrated that listeners rated the later recordings as less healthy relative to the earlier ones. Listeners’ experience with speech disorders influenced the trend, which was more pronounced for the experienced listeners compared to the listeners with no prior experience with speech disorders.
Acoustic Analysis of Occlusive Weakening in Parkinsonian French Speech
2008
The current study investigated selected acoustic characteristics of the weakening of occlusives (O's) in French Parkinsonian Speech (PS). The results confirm an increase in the reduction of O's in PS compared to control speech (CS). In PS, O's have a significantly decreased intervocalic energy level, slightly shorter realisations and a higher number of visible formants and noise; the number of burstless and omitted O's is also higher. However, weakening patterns vary between different consonants and are strongly dependent on voicing and place. Occlusive weakening, a consequence of Parksinson's disease production deficits, appears to be influenced by the inherent- articulatory characteristics of consonants.