未踏特徴量領域の感性分析による潜在評価因子の抽出法 : 製品音の感性品質への適用(<小特集>第18回設計工学・システム部門講演会)

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In the design of emotional qualities, setting quantitative evaluation criteria to evaluate such qualities is important. Without such criteria, the designer has to rely on his/her sensitivity, which may be different from the customer's making it difficult to set a clear design goal. The customer's sensitivity towards such qualities is subjective, latent and diverse. In our previous study, we proposed a quantification method of emotional qualities with attention paid to its diversity and applied the method to quantify the product sound quality. The authors formalized several emotional qualities expressed by adjectives using the proposed method with sound samples recorded from existing products. However, the variety of existing products was limited. The obtained evaluation criteria may not cover areas in a design space where future designs would appear. In this paper, we aim to cover such untouched design area using composite samples and extract a potential factor for the future design. To create such composite samples, we set efficiest design features that take into consideration the completeness of design space and the diversity of a target emotional quality that we quantify using the results of sensory tests with existing product. We conduct a new set of sensory tests with composite samples and compare the results with those from previous test, in order to discuss changes introduced by adding created sounds. We extracted a new emotional scale of target emotional quality "expensiveness of machine sound" that was not found in 1st sensory test based only on the existing product sound. The emotional scale contains two different viewpoints of "reliable sound". One is associated with silent and composed sound and another is powerful and obstructed sound. Using a factor analysis considering the diversity of human sensitivities, we found those two viewpoints of "reliable sound" in 1st and 2nd factors respectively. The first factor negatively related to loudness. The second factor related to lower sharpness and the existence of a perceivable peak tone around 500Hz. Most product makers are aware of the need to reduce loudness, i.e., the first factor. We extracted the second factor as a new evaluation criterion.
社団法人日本機械学会の論文
2009-08-25

未踏特徴量領域の感性分析による潜在評価因子の抽出法 : 製品音の感性品質への適用(<小特集>第18回設計工学・システム部門講演会)

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