武田 昌一, 上野 雄大, 中迫 昇, 中川 秀夫, 真紀子, 磯部 理沙子. Spectral-Tilt Features of Emotional Speech -Research on Emotional-Speech Synthesis Based on Voice-Quality Conversion-. Proceedings of the International Conference on Kansei Engineering and Emotion Research 2010. 2010. 1081-1090