The Characteristics of Inevitable Sound from Products by the Kansei Evaluation

Toshimasa YAMANAKA*, Masao KONDOU***University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8574 Japan**YAMAHA co. Ltd.

1.

INTRODUCTION

regression analysis to determine the effects of kansei.

The designed products surrounding us make variety ofFor the sense of comfortable / uncomfortable, the classy

sound, not only designed to make but also inevitably made.

feeling is most important. Sense of unity came next andFor example, the sound of shutter release of a camera thatrichness and smoothness were also important. For the sense ofwould make certain image of a product. Recently, material

like / dislike, the feeling of delicate and silence are mostand mechanism of camera changed. As a result, the sound ofimportant. For the sense of good / bad, sense of classy andcamera became dried and mild, that could make shooter as

feeling of delicate was major source followed by Smoothness

less intensive. Like this those sounds can be considered as aand sense of silence. With this analysis, the major senses

factor that consists products’ impression. Sound-scape is arelated to value are confirmed. Then we tried to check out thefield of design that can evaluate the relationship between

proportion of effects throughout the composted sounds. Result

human and sound as an environment. In this basic research,of conjoint analysis showed that the sound while sliding out

we focused on the Kansei evaluation of the inevitable soundthe CD-tray is most effective sound. From the result offrom CD player.

ANOVA, the sound sliding in the CD-tray was generally mostsignificant for 16 evaluation words. However, the result of２．EXPERIMENTAL

conjoint analysis showed that, the sound while sliding out theFor the samples of experiment, we selected five CD player

CD tray was more effective for the evaluation of valuablewith front loading tray. Firstly, we defined the sound issense. Following the sliding out sound, the sound of sliding inconsist with six components (fig-1). Using the experimental

and start sliding was significant. With result, a part of design

design method, five samples and six parts, we could make 25

factor of sound-scape for CD player was known. Additionally,arrangement of experimental sample with those parts. 15

we measured the frequency characters of those sample sounds.

panel ranging 20 to 23 school students was selected for thisTry to clear the relations between the result of kansei

experiment, For the Kansei evaluation, we selected eight pairs

evaluation and the effective physical value of sound. Fromof evaluation words distributed from the known research. Alsothese samples, the sound tray slides in was most clearly

we added eight more pares of words that could be related tomeasured. With tee result, the alteration of sound characters

the product’s image. Totally, 16 pairs of evaluation words was

such as strength of sound had negative effect for [good / bad].

applied for evaluate 25 different combination of sounds.

This result clearly shows the valuable evaluation such as
sense of smoothness, silence or classy is effected by that

３．RESULT AND DISCUSSION

continuity of physical value.

Firstly, we applied the ANOVA for the analysis of evaluation
those 16 pairs and 25 combinations, W found there was asignificant difference between the sounds of closing. On theother hand, the sound start-closing and ends-closing are
insignificant in the evaluation. Smoothness, sense of weight,
cheep-classy and firm – un -firm are significant throughout
the components.
There was three pairs of words for value, such as [like /dislike], [good / bad], [comfortable / uncomfortable]. Using
those evaluations as a dependent variable, we applied multiple

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Figure 1 Components of sound and result of conjoint analysis