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

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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A Study on the Sound Absorptive Characteristics and Performance of Parallel Perforated Plate Systems

병렬 다공판 시스템의 흡음특성과 성능에 관한 연구

  • 홍병국 (서울산업대학교 에너지시스템공학과) ;
  • 송화영 (서울산업대학교 에너지시스템공학과) ;
  • 서성원 (서울산업대학교 기계공학과) ;
  • 이동훈 (서울산업대학교 에너지환경대학원)
  • Published : 2005.09.01
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Abstract

The acoustic absorption of a multiple layer perforated plate system is very good near the resonance frequency region, while it has been regarded as a demerit that its frequency bandwidth is considerably narrow. In order to overcome such a demerit, the parallel perforated plates with different porosities are proposed. The sound absorption of such system composed of a parallel perforated plate is calculated by an equivalent electroatoustic circuit approach and validated by comparing the calculated absorption coefficients with those measured by the two-microphone impedance tube method. The sound absorptive characteristics and performance of parallel perforated plate systems are discussed from a standpoint of frequency bandwidth related with sound absorption.

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References

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