Abstract
In the design of matured product, it is important design a product sound as a kansei(affective) quality. Most of product sounds have ultiple tones e.g. harmonic overtones caused by frequency of fans. In the music theory, tones have chords. People often feel comfortable in chordal tones. The authors assume that chordal harmony in machine sound improves the product kansei quality. To verify the assumption, we synthesized product sound samples (vacuum cleaner) having different tone frequencies and powers. Using the synthesized samples, we conducted kansei evaluation experiments. The result shows that the chordal features of tones are effective to improve product kansei quality.
