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KMID : 0917520000070030285
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Journal of Speech Sciences
2000 Volume.7 No. 3 p.285 ~ p.294
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Analysis and Comparisons of Acoustical Characteristics of Pathologic Voice before and after Surgery
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Baek Moo-Jin
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Abstract
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In this paper the acoustic characteristics of pathological voice, which are measured before and after surgical operation, are compared. This experiment is conducted for the purpose of predicting patients´ speech after operation. The voices are recorded from the same patients. Jitter, shimmer and other parameters are computed and their statistical characteristics are compared. Also spectral changes, such as formant frequency shift and spectral slope change, are compared. From the experimental results, it is verified that not only source characteristics but also vocal tract components vary. And this indicates that the modification of source parameters are not enough for the prediction. Also the result indicates that the operation causes change to both the physical shape of vocal folds and the manner of articulation.
Keywords : Pathologic voice, Acoustic characteristrics, Formant frequency, Jitter, Shimmer
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