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    This chapter contains sections titled: 1.1 Sounding Objects in Pre-Twentieth-Century Everyday Life, 1.2 A Luxurious Silence: The Early Days of Car Sound Design, 1.3 Listening to the Engine: Car Sound as Source of Information, 1.4 A Smart Sound: Car Sound Design Today, 1.5 Conclusions, Notes, References
    The vibration and noise of automobiles by lightening might cause decreasing the product value. In this study, an improvement of the door closing sound of lightened door and a structural modification of the door outer panel were investigated in consideration of human sensibility. To forecast by CAE easily, a series of verifications was done with a simplified door experiment model. Acoustic sensitivity analysis was used to detect an effective position for structural changing. Finally, an actual door closing sound was designed to a pleasant sound.
    Position (finance)