吸音材による自動車エンジン音から感じる“スポーティ感”の感性制御

抄録

Currently, sound quality control using Active Noise Control (ANC) and Passive Noise Control (PNC) has been used as noise reduction methods. ANC has an effect on the low-frequency noise, and PNC affects the high-frequency noise. However, in the case of sound control, our previous study revealed that individual preference affects the sound impression strongly to each. In recent years, as the quality of automobiles is developing day by day, the driving sound of automobiles has become an essential factor affecting an auditory impression. In other words, the engine sound control has been shifting from noise control to sound design. In this study, we investigated how the impression of engine sound changes by sound absorbers. The engine sound in the automobile with or without sound absorbers was investigated. Furthermore, these sounds were analyzed by the SD method and factor analysis to find a subjective impression. As a result, the subjective indicator (adjective pair) that affected the auditory impression was clarified. Moreover, the possibility of adding specific sound impressions by changing sound absorbers was also conducted. The MUSHRA method was adopted as the evaluation method. The relationship between the frequency band that adds a specific impression and the auditory impression was clarified by the MUSHRA method.