A Cross-Language Study of Acoustic Predictors of Speech Intelligibility in Individuals With Parkinson's Disease

Kim, Yunjung; Choi, Yaelin

doi:10.1044/2017_jslhr-s-16-0121

Cited by 35 publications

(19 citation statements)

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“…; but see Wong, Murdoch, & Whelan, 2010. Acoustically, a reduced vowel contrast has been frequently reported for talkers with PD (e.g., contracted acoustic vowel space area, reduced formant transition extents) and is thought to reflect hypokinesia within the articulatory subsystem (e.g., Forrest et al, 1989;Kim & Choi, 2017;Mefferd, 2015;Skodda, Grönheit, & Schlegel, 2012;Skodda, Visser, & Schlegel, 2011;Tjaden, Lam, & Wilding, 2013;Tjaden & Wilding, 2004;Walsh & Smith, 2012;J. A. Whitfield & Goberman, 2014).…”

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confidence: 99%

Tongue- and Jaw-Specific Articulatory Underpinnings of Reduced and Enhanced Acoustic Vowel Contrast in Talkers With Parkinson's Disease

Mefferd

Dietrich

2019

J Speech Lang Hear Res

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This study sought to identify the articulatorspecific mechanisms that underlie reduced and enhanced acoustic vowel contrast in talkers with dysarthria due to Parkinson's disease (PD). Method: Seventeen talkers with mild-moderate dysarthria due to PD and 17 controls completed a sentence repetition task using typical, slow, loud, and clear speech. Tongue and jaw articulatory movements were recorded using 3D electromagnetic articulography. Independent tongue displacements, jaw displacements, and acoustic vowel contrast were calculated for the diphthong /aɪ/ embedded in the word kite. Results: During typical speech, independent tongue displacement, but not jaw displacement, contributed significantly to the intertalker variance in acoustic vowel contrast. Loudness-related acoustic vowel contrast gains were predominantly jaw driven in controls but driven by the tongue and jaw in talkers with PD. Further, in both groups, clarity-related acoustic vowel contrast gains were predominantly jaw driven. Finally, in both groups, rate-related acoustic vowel contrast gains were predominantly tongue driven; however, the jaw also contributed. These jaw contributions were greater in the PD group than in the control group. Conclusions: Findings suggest that a tongue-specific articulatory impairment underlies acoustic vowel contrast deterioration in talkers with PD, at least during the early stages of speech decline. Findings further suggest that slow speech engages the impaired tongue more than loud and clear speech in talkers with PD. However, slow speech was also associated with an abnormally strong jaw response in these talkers, which suggests that a compensatory articulatory behavior may also be elicited. P arkinson's disease (PD) is a neurodegenerative disease commonly associated with a progressive impairment of motor functions. Cardinal motor symptoms include a resting tremor, slowed movements (bradykinesia), reduced movements (hypokinesia), muscle stiffness (rigidity), and postural instability (e.g., Jankovic, 2008). In addition to progressively impaired limb motor functions (e.g., walking, writing, reaching, and grasping), bulbar motor functions (e.g., speaking, swallowing) can also become affected. In fact, up to 90% of people with PD develop dysarthria (e.g., Ho, Iansek, Marigliani, Bradshaw, & Gates, 1998; Logemann, Fisher, Boshes, & Blonsky, 1978). The deterioration of speech function is characterized by pathological changes in speech breathing, vocal quality, vocal loudness, speaking rate, prosody, and speech sound precision; however, the extent to which these pathological changes manifest can vary greatly among talkers with PD (e.g., Darley,

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confidence: 99%

Tongue- and Jaw-Specific Articulatory Underpinnings of Reduced and Enhanced Acoustic Vowel Contrast in Talkers With Parkinson's Disease

Mefferd

Dietrich

2019

J Speech Lang Hear Res

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“…According to studies of the acoustic characteristics of clear speech, increased vowel spacing is associated with greater intelligibility [3,[5][6][7]. Reduced stop burst omission, increased root mean square (RMS) intensity by 10dB, increased voice onset time (VOT) of voiceless consonants, and increased consonant-vowel ratio are also well-known characteristics of clear speech [8,9].…”

Section: Introductionmentioning

confidence: 99%

“…Reduced stop burst omission, increased root mean square (RMS) intensity by 10dB, increased voice onset time (VOT) of voiceless consonants, and increased consonant-vowel ratio are also well-known characteristics of clear speech [8,9]. Kim and Choi [7] reported that the vowel space was the single most significant factor in the intelligibility of speech in English, accounting for 61.9% of the intelligibility; whereas 89.7% of intelligibility-related variance of speech in Korean was explained by factors such as vowel space (65.4%), VOT (13.4%), and the articulation rate (10.9%). Kim and Choi speculated that one possible reason for this language difference is the denser acoustic and articulatory space for Korean stops, which makes VOT critical for speech intelligibility.…”

Section: Introductionmentioning

confidence: 99%

“…Only one study [10], which investigated speech production of adults with cerebral palsy, did not find significant influence of VOT on intelligibility as much as tongue strength did. Therefore, in the Korean language, nine stops appear in high frequency among all Korean consonants, and the VOT contrast contributes to the overall intelligibility [7]. Additionally, stops are not only the indicators of speech intelligibility, but they also reflect the coordination of laryngeal and supra-laryngeal level mechanisms [11,12].…”

Section: Introductionmentioning

confidence: 99%

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Acoustic analysis of Korean stop sounds in patients with dysarthrias

Kim¹,

Kim²

2019

Clin Arch Commun Disord

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Dysarthria is a motor speech disorder that occurs due to abnormalities in the central and/or peripheral nervous system. The speed, strength, range, steadiness, and tone of motor speech behaviors are affected by the abnormal performances of nerve fibers and muscles [1,2]. This disorder is known to influence five speech components, including respiration, phonation, articulation, prosody, and resonance [1,2]. Because all phonemes in the language are influenced by the disorder, the overall intelligibility, rather than the percentage of correctly produced consonants, has been of interest to both clinicians and researchers."Speech intelligibility" is a measurement that scores how much listeners can under-Purpose: Korean 'stops' are considered an especially good acoustic variable since they are sensitive to speech intelligibility and reflect physiological coordination between laryngeal and supra-laryngeal mechanisms. The purpose of the study was to evaluate the acoustic characteristics of both the dysarthria and control groups in the production of nine Korean stops, /p, p', p h , t, t', t h , k, k', k h /, in VCV contexts. Methods:The participants comprised eight patients with dysarthria and eight age-and gender-matched normal adults. After the acoustic analysis of the closure duration, aspiration duration, and the ratio of closure duration to closure-aspiration combined duration, the results were compared among three types of phonation and places of articulation for Korean stops.Results: The dysarthria group (DG) had longer closure durations, suggesting slower articulatory movements of the DG than the normal control group (NC). Although statistically not significant except for /ap'a/ and /at'a/, the absolute aspiration durations of the DG were still longer than those of the NC. This resulted in the normal levels of ratios in the DG between closure duration and closure-aspiration combined durations. Furthermore, the DG could change the durational aspects of stop production distinctively according to types of phonation more than they could according to the places of articulation. This trend was more prominent during the closure duration than during the aspiration duration.Conclusions: This finding suggested that while the DG has centralized tongue positions, they control the tenseness and the timing coordination between laryngeal and supra-laryngeal articulators to distinctively produce different types of phonation of stops.

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“…VOT는 한국어를 포 함하여 여러 언어들의 파열음 지각에 중요한 역할을 하는데 후두 및 상 후두 기관 간의 조절 문제는 VOT 값에 영향을 미친다 (Auzou et al, 2000;Lisker & Abramson, 1964). IPD 환자군의 VOT 길 이는 길어지거나 (Novotný, Rusz, Čmejla, & Růžička, 2014), 변화가 없거나 (Harel, Cannizzaro, Cohen, Reilly, & Snyder, 2004) 감소된 다 (Flint, Black, Campbell-Taylor, Gailey, & Levinton, 1992) (Fisch-er & Goberman, 2010;Park, Hashimato et al, 2006 (Kim & Choi, 2017). 몇몇 선행 연구를 통해 한국어 파열음 의 '삼중 대립'과 관련하여 마비말장애 유형에 따른 특성 및 IPD 환자군의 음향학적 , 질적 분석 (Park, Itoh et al, 2006) 16.9)보다 유의하게 길었다(p < .01).…”

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Acoustic and Auditory-Perceptual Characteristics of Korean Stop Consonants in Patients with Idiopathic Parkinson’s Disease and Cerebellar-Multiple System Atrophy

Kim¹,

Rhee²,

Cho³

et al. 2020

Commun Sci Disord

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A Cross-Language Study of Acoustic Predictors of Speech Intelligibility in Individuals With Parkinson's Disease

Cited by 35 publications

References 64 publications

Tongue- and Jaw-Specific Articulatory Underpinnings of Reduced and Enhanced Acoustic Vowel Contrast in Talkers With Parkinson's Disease

Tongue- and Jaw-Specific Articulatory Underpinnings of Reduced and Enhanced Acoustic Vowel Contrast in Talkers With Parkinson's Disease

Acoustic analysis of Korean stop sounds in patients with dysarthrias

Acoustic and Auditory-Perceptual Characteristics of Korean Stop Consonants in Patients with Idiopathic Parkinson’s Disease and Cerebellar-Multiple System Atrophy

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