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정행진(Hang-jin Jung),서충열(Chung-youl Seo) 한국자동차공학회 2000 한국자동차공학회 지부 학술대회 논문집 Vol.- No.-
The major effective factor on the inner noise of a bus are the structure borne noise and air borne noise. Engine contributes about 80% of the vibration and noise in the vehicle, and exciting forces of the engine are transmitted onto the body through the rubber mount.<br/> This apper aims to investigate the characteristics of engine room walls are insulated, such as<br/> multi layer walls of engine room.<br/> Six kinds of compartment walls are varied with materials and multi layer, depth. Acoustics<br/> characteristics of these partitions, transmission loss, are tested in reverberation chambers.