Journal of the Korean Society for Railway (한국철도학회논문집)

The Korean Society for Railway (한국철도학회)
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A Study to Estimate Transmission Loss of HST using a Small Scale Reverberation Chamber

소형잔향실을 이용한 고속철도 차량 구조재의 투과손실 연구

  • 김태민 (홍익대학교 기계공학과 음향 진동 실험실) ;
  • 김정태 (홍익대학교 기계 시스템 디자인 공학과)
  • Received : 2011.01.27
  • Accepted : 2011.02.18
  • Published : 2011.02.26
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Abstract

The method to reduce interior noise of train was being studied. To improve transmission loss of train is one of the best way to reduce interior noise. But, the estimate to transmission loss requires lots of the commercial costs. In this study, the method to estimate transmission loss of high speed train is proposed using a scale reverberation chamber. The result shows that a transmission loss estimated using small scale reverberation is similar to that using huge reverberation chamber. The transmission loss estimated based on small scale reverberation chamber can be optimal with respect to the commercial coasts.

고속철도 차량의 고속화, 경량화와 더불어 승객의 실내 소음을 줄이기 위한 많은 연구가 진행되고 있다. 고속철도 차량의 실내 소음을 줄이는 방법으로 차량 구조물의 차음 성능을 향상시키는 연구가 중요시 되고 있으나 투과손실 연구는 많은 경제적 비용이 요구된다. 따라서 본 연구에서는 소형 잔향실을 이용하여 고속철도 차량의 투과손실을 측정할 수 있는 방법을 연구 하였다. 연구 결과 소형 잔향실을 이용한 차음성능 연구가 대형 잔향공간을 이용한 투과손실 결과 대비 신뢰성 있는 결과를 도출 하였다.

Keywords

References

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