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NOISE REDUCTION OF AN ENCLOSED CAVITY BY MEANS OF AIR-GAP SYSTEMS  

Kang, S.W. (Department of Mechanical Systems Engineering, Hansung University)
Lee, J.M. (School of Mechanical and Aerospace Engineering, Seoul National University)
Publication Information
International Journal of Automotive Technology / v.5, no.3, 2004 , pp. 209-213 More about this Journal
Abstract
The objective of this paper is to introduce the noise reduction characteristics of a double gap system, which is composed of two air-gaps and two partition sheets. The resonance of acoustic modes of an enclosed cavity can be effectively suppressed by installing the double gap system in the cavity. It is revealed from a simple, one-dimensional model that the double gap system is more effective than the single gap system that consists of one air-gap and one partition sheet, in that the former requires a smaller space than the latter. Finally, these theoretical conclusions are verified by comparison experiments using an actually manufactured enclosed cavity, of which the boundary surfaces are made of thick panels that can be assumed as rigid walls.
Keywords
Noise reduction; Passenger compartment; Gap resonator; Helmholtz resonator; Resonance; Cavity;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
Times Cited By Web Of Science : 1  (Related Records In Web of Science)
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