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Figure 4


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Box-plot of attributes rating (a–f) and desire-to-buy rating (g) for constant speed condition. Test NOEQ. The x-axis represents the seven sound samples evaluated and the y-axis represents the ratings in % of the participants for each attribute. The median is represented by a black dot surrounded by a colored circle. The 25th and 75th percentiles are presented by a thick solid line. The thin lines added at the ends extend to the extreme values (maximum and minimum) and the outliers are marked as circles. The confidence interval of the median values is represented by triangles. (a) Powerful, (b) Aggressive, (c) Metallic, (d) Noisy, (e) soft, (f) Vibrating and (g) Desire-to-buy.

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