The Impression of Engine Sounds of Sports-Type Motorcycles
It is often said that engine sound is one of the most important factors when selecting a motorcycle from different models. Especially, the engine sound during the acceleration deeply becharms sports-type motorcycle riders. In the present study, how the engine sounds of various models while being accelerated sound different was investigated. Six models produced by five constructers were driven by a test rider on a chassis dynamometer and the engine sounds were recorded under two conditions; rapid acceleration and slow acceleration. In the first experiment, university students listened to these recorded twelve engine sounds and rated their impression using semantic differential scales. Principal component analysis showed that the impression of the sounds was constructed by two dimensions; “roughness and “activity. On the “activity axis the sounds were divided into rapid and slow acceleration groups, and the “roughness was found to be almost fixed in each model. Some of the models showed a large difference in the “activity between the two conditions, while for the others, the difference was relatively small. This suggests that riders can enjoy a wide range of activity from a calm to an exciting feeling from the engine sound for some models, but not for the other models, while riding. In the second experiment, only the rapid acceleration sounds were used as stimuli to reveal the sound characteristics of each engine under the same method of acceleration. These sounds were rated by motorcycle riders and non-riders using semantic differential scales. Principal component analysis showed that the impression of the engine sounds was similar in a twodimensional space to Experiment 1. The results showed that riders were more sensitive than non-riders on the “activity. However, there were no significant differences between the two groups in the degrees of “roughness. Moreover, on the “roughness the alignment of the engines were almost identical to the results in Experiment 1. These results and the sound spectrogram of the sounds suggest that the “roughness is almost determined by the architecture of the engine. On the other hand, the “activity is a perceptual property which is widely varied by the method of acceleration or the riding experience. The results of the experiments also showed that an “active and “smooth engine sound is preferred by both riders and non-riders.
Kenta Matsubara Yuma Sakabe Makoto Aoki Hiroshi Yano Masako Tanaka Masashi Yamada
Technical Institute,Kawasaki Heavy Industries,Ltd. Kanazawa Institute of Technology
国际会议
The 10th Western Pacific Acoustics Conference(第十届西太平洋声学会议WESPAC X)
北京
英文
1-8
2009-09-21（万方平台首次上网日期，不代表论文的发表时间）