Transactions of the Korean Society for Noise and Vibration Engineering (한국소음진동공학회논문집)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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Noise Source Identification of a Car A/V System

차량탑재용 A/Y 시스템의 소음원 규명

  • 홍종호 (서울대학교 대학원 기계항공공학부) ;
  • 이상호 (현대모비스 카트로닉스 오디오연구부) ;
  • 강연준 (서울대학교 기계항공공학부)
  • Published : 2004.10.01
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Abstract

This paper presents the noise source identification of a car A/V system. There are two different kinds of noise sources noise generated by loading mechanism and rattle noise by externally forced vibration. A dynamometer has been made to produce stationary inertia to the loading mechanism of A/V system. Sound pressure spectra and sound intensity were measured by operating the dynamometer setup as various motor speeds, and the results were analyzed. A dominant rattle noise source about A/V system's components has been found by multi-dimensional spectral analysis. Residual spectrum method was applied for eliminating coherence between the vibration sources. In result, the dominant rattle noise source was identified by partial coherent output spectrum of individual vibration component.

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References

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