パラ言語情報の生成と知覚 : 多次元尺度法による布置と音響特徴の関係 [in Japanese] Production and Perception of the Paralinguistic Information in Speech : A Multidimensional Scaling Analysis [in Japanese]
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筆者らはこれまでにパラ言語情報の伝達にかかわる音声特徴を音饗的に分析してきた. 本稿ではパラ言語情報の知覚に対する検討をおこなう. 6種類のパラ言語情報(疑い, 感心, 落胆, 無関心, 中立, 強調)の同定実験を実施し, そのデータから計算された類似度を多次元尺度構成法(MDS)によって解析したところ, 3次元解が最適との結果を得た. 三つの次元それぞれにおける刺激の座標値を従属変数, これまでに報告してきた音響特徴を独立変数として重回帰分析をおこなったところ, 高い精度で刺激の布置を予測できることが明らかになった.
We have been engaged in the acoustic analyses of the paralinguistic information conveyed by speech. The results of the preceding studies were recapitulated in the first half of this paper. In the rest of the paper, results of a newly conducted perception experiment were presented. In the perception experiment, subjects were required to identify the six paralinguistic information (i.e. suspicion, admiration, disappointment, indifference, neutral, and focussed) of the 486 utterances uttered by 3 speakers. Then, the identification data was converted into a similarity matrix and analyzed by using Kruskal's multidimensional scaling method. Three dimensions were extracted with the stress of 0.04. These dimensions could be interpreted as "the salience of paralinguistic information (DIM1)", "initiation in terms of information requirement (DIM2)", and "the magnitude of overall utterance (DIM3)." Finally, a multiple regression analysis was conducted between the result of MDS and the 13 acoustic correlates that we have found in the previous analyses, whose results showed high correlation. DIM1 (R^2=0.87) was correlated mainly with the duration of utterances, DIM2 (R^2=0.64) with the pitch range of the final syllable, and DIM3 (R^2=0.53) with both the averaged pitch and RMS amplitude of the whole utterances.
- IEICE technical report. Speech
IEICE technical report. Speech 99(74), 9-16, 1999-05-21
The Institute of Electronics, Information and Communication Engineers