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http://dx.doi.org/10.3795/KSME-A.2004.28.2.118

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

Kang, Sang-Wook (한성대학교 기계시스템공학과)
Lee, Jang-Moo (서울대학교 기계설계학과)
Lim, Won-Sik (서울산업대학교 자동차공학과)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.28, no.2, 2004 , pp. 118-124 More about this Journal
Abstract
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.
Keywords
Air Gap; Roof; Headliner; Helmholtz Resonator; Resonance Frequency; Noise Reduction;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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