대한기계학회논문집A (Transactions of the Korean Society of Mechanical Engineers A)

  • 제28권2호
  • /
  • Pages.118-124
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  • 2004
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  • 1226-4873(pISSN)
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  • 2288-5226(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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고효율 에어갭 공명기의 소음 저감 특성

Noise Reduction Characteristics of a High-performance Air-gap Resonator

  • 강상욱 (한성대학교 기계시스템공학과) ;
  • 이장무 (서울대학교 기계설계학과) ;
  • 임원식 (서울산업대학교 자동차공학과)
  • 발행 : 2004.02.01
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초록

The objective of the paper is to demonstrate the noise reduction characteristics of an air-gap resonator, which is composed of an air gap and a partition sheet. By means of installing the air-gap resonator in an enclosed cavity, acoustic resonance can be effectively suppressed using a small space. In particular, it is revealed from a simple, one-dimensional model that the air-gap resonator serves as the Helmholtz resonator that generally absorbs acoustic resonance energy at its resonance frequency. As a result, the air-8ap resonator also has a resonance frequency, which can be predicted with a simple frequency equation derived in the paper. Finally, verification experiments show that the air-gap resonator can be effectively designed by predicting a reasonable gap thickness using the simple frequency-equation.

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참고문헌

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