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KMID : 1022420160080020073
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Phonetics and Speech Sciences
2016 Volume.8 No. 2 p.73 ~ p.80
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Cepstral and spectral analysis of voices with adductor spasmodic dysphonia
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Shim Hee-Jeong
Jung Hun
Lee Sue Ann
Choi Byung-Heun
Heo Jeong-Hwa
Ko Do-Heung
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Abstract
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The purpose of this study was to analyze perceptual and spectral/cepstral measurements in patients with adductor spasmodic dysphonia(ADSD). Sixty participants with gender and age matched individuals(30 ADSD and 30 controls) were recorded in reading a sentence and sustained the vowel /a/. Acoustic data were analyzed acoustically by measuring CPP, L/H ratio, mean CPP F0 and CSID, and auditory-perceptual ratings were measured using GRBAS. The main results can be summarized as below: (a) the CSID for the connected speech was significantly higher than for the sustained vowel (b) the G, R and S for the connected speech were significantly higher than for the sustained vowel (c) Spectral/cepstral parameters were significantly correlated with the perceptual parameters, and (d) the ROC analysis showed that the threshold of 13.491 for the CSID achieved a good classification for ADSD, with 86.7% sensitivity and 96.7% specificity. Spectral and cepstral analysis for the connected speech is especially meaningful on cases where perceptual analysis and clinical evaluation alone are insufficient.
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KEYWORD
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spasmodic dysphonia, cepstrum, spectrum, CPP, L/H ratio, mean CPP F0, CSID, GRBAS
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