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A Study on the Improvement of Acoustic Absorption of Multiple Layer Perforated Panel Systems

다중 다공판 시스템의 흡음성능 향상에 관한 연구

  • 이동훈 (서울산업대학교 에너지환경대학원 에너지시스템공학과) ;
  • 서성원 (서울산업대학교 기계공학과) ;
  • 홍병국 (서울산업대학교 에너지환경대학원 에너지시스템공학과) ;
  • 송화영 (서울산업대학교 에너지환경대학원 에너지시스템공학과)
  • Published : 2005.05.01

Abstract

The acoustic absorption of multiple layer perforated panel systems is largely reduced at the anti-resonance frequency. In order to improve the acoustic absorption at the anti-resonance frequency, the sound absorbing materials are inserted between perforated panels. By the insertion of absorbing materials, it is found that the multiple layer perforated panel system has better acoustic absorption at the anti-resonance frequency and more broadband frequency. Besides, it is shown that the absorption coefficients from the transfer matrix method agree well with the values measured by the two-microphone impedance tube method for various combinations of perforated panels, airspaces or sound absorbing materials.

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