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

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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The Use of Vibro-acoustical Reciprocity to Estimate Source Strength and Airborne Noise Synthesis

구조-음향 상반성 원리를 이용한 공기기인 소음원의 강도 추정 및 소음 합성

  • 김윤재 (서울대학교 대학원 기계항공공학부) ;
  • 변재환 (서울대학교 대학원 기계항공공학부) ;
  • 강연준 (서울대학교 차세대자동차연구센터) ;
  • 홍진철 (현대기아자동차 남양기술연구소) ;
  • 권오준 (현대기아자동차 남양기술연구소) ;
  • 강구태 (현대기아자동차 남양기술연구소)
  • Published : 2009.01.20
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Abstract

In this paper, an alternative method was introduced to conduct a transfer path analysis for airborne noise. The method used the transfer function matrix composed of acoustic transfer functions that are referenced by the input voltage of a calibration source. A calibration factor which is converting a virtual voltage to source strength was deduced by vibro-acoustical reciprocity theorem. The calibration factor is then multiplied to the virtual input voltage to estimate the operational source strength. Three loudspeakers were used to noise sources of acrylic half car model. The method was applied to airborne noise transfer path analysis of the half car. The estimated source strength by transfer path analysis was compared the deduced source strength by vibro-acoustical reciprocity to verify the method.

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References

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