Sentiment analysis of color attributes derived from vowel sound impression for multimodal expression

In this paper, the sentiment correlation between color and speech has been investigated aiming at multimodal expression of information embedded in speech. To cope with the necessity of information specification for further analyses and control of speech so called para-linguistic information, we carried out an sentiment experiment on the correlations between speech characteristics and color attributes associated by perceptual impressions. Using five vowel categories with twelve different prosodie patterns, we found high correlations between speech features (vowel categories and FO) and three attributes of color (hue, saturation and value). These correlations open up wide possibilities to describe and quantitatively analyze speech information that has not yet been systematically studied but partially treated as emotional variants or para-linguistic information.