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An Experimental Study on Acoustic Absorption in a Model Chamber with a Half-Wave Resonator  

Sohn, Chae-Hoon (세종대학교 기계항공우주공학과)
Park, Ju-Hyun (세종대학교 대학원 기계공학과)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.12, no.3, 2008 , pp. 34-40 More about this Journal
Abstract
Acoustic design parameters of a half-wave resonator are studied experimentally for acoustic stability in a model chamber. According to the standard acoustic-test procedures, acoustic-pressure signals are measured. Quantitative acoustic properties of damping factor and sound absorption coefficient are evaluated and thereby, the acoustic-damping capacity of the resonator is examined. The diameter and the number of a half-wave resonator, its distribution, and the diameter of an enclosure are selected as the design parameters for optimal tuning of the resonator. Aroustic-damping capacity of the resonator increases with its diameter. When the open-area ratio of the resonator exceeds the optimum value, over-damping appears, leading to the decrease in the peak absorption coefficient and the broadening of absorption bandwidth. As the resonator diameter increases, optimum open-area ratio decreases.
Keywords
Half-wave Resonator; Absorption Coefficient; Optimal Tuning; Over-Damping;
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Times Cited By KSCI : 4  (Citation Analysis)
연도 인용수 순위
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