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 Acoustic Absorption Performance of a Helmholtz Resonator

헬름홀츠 공명기의 흡음성능에 관한 연구

  • 송화영 (서울산업대학교 에너지환경대학원 에너지시스템공학과) ;
  • 이동훈 (서울산업대학교 기계공학과/에너지환경대학원)
  • Published : 2008.01.20
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Abstract

A helmholtz resonator has been widely used for the purpose of suppressing the low frequency noises propagated from various heat and fluid machineries. However, the conventional resonator has demerits that the effective absorption bandwidth is narrow and the absorption performance is not so outstanding in the only limited configurations of neck and cavity as well. In order to overcome these problems, in this paper, a resonator with perforated neck is proposed. The absorption performances of the resonator are measured by two-microphone method and estimated by transfer matrix method. The measured values of normal absorption coefficients agree well with the estimated values. By introducing the perforated plates at the neck of a resonator, it is shown that the absorption performance have been significantly improved.

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References

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