サウンド・スペクトログラフによる病的音声の分析

概要

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Possibility of differentiating causative diseases by a sound spectrographic analysis of pathological voices was investigated. Voice materials used were sustained vowels uttered by patients of vocal polyp(or nodule), sulcus vocalis, recurrent laryngeal nerve paralysis and laryngeal cancer(110 cases in total), and normal speakers(20 cases). Acoustical parameters, which were revealed to be valuable in our previous analysis by computer, such as the degree of the fluctuation in the fundamental frequency and in the amplitude, richness of higher harmonic components, and amount of noise components in various frequency ranges were measured from pattern, section and amplitude display of the sound spectrograms. Using canonical analysis based on those acoustical parameters, voise of about 85% of the patients were differentiated from that of the normal speakers, and for about 75% of the patients suffering from laryngeal cancer, the kind of disease was identified correctly.
社団法人日本音響学会の論文
1979-12-25