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Development of Experimental Procedure for （实验过程的发展）
th Proceedings of 20 International Congress on Acoustics, ICA 2010 23-27 August 2010, Sydney, Australia Development of Experimental Procedure for Detecting and Evaluating Squeak and Rattle Noise Emission from the Instrument Panel in a Vehicle Su-Hyun Shin(1), Duck-Whan Kim (1) and Cheolung Cheong (2) (1) Automotive Parts Innovation Center, Ulsan, Republic of Korea (2) School of Mechanical Engineering, Pusan National University, Pusan, Republic of Korea PACS: 43.40.-r ABSTRACT Among the various elements affecting a customer’s evaluation of automobile quality, buzz, squeak, and rattle (BSR) are consid- ered to be major factors. We propose an integrated experimental method that can be used to reduce BSR in an instrument panel mod- ule in a vehicle cabin, especially during the early design stage of vehicle development. We devised a vibration triggering system consisting of a fixture and an electromagnetic shaker to generate an input load reproducing the excitation signal from the road to the instrument panel without distortion. Potential source regions for BSR were localized using a near-field acoustic holography map obtained from near-acoustic field visualization equipment consisting of 48 intensity-type microphones, a data-acquisition system, and its analysis software. Finally, a sound quality evaluation of BSR from the detected potential source regions was performed using sound quality metrics. These experimental procedures were applied to characterize BSR from the instrument panel in a passenger vehicle. Based on our measurements and analysis, typical m
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