A Case Study on Inside Noise Reduction of Agricultural Tractor Cab(I) -Analysis of Sound and Sound Intensity Levels-

농용 트랙터의 안전캡 내부 소음 감소에 관한 연구( I ) -소음과 음향 강도 수준 분석-

High level of tractor noise may reduce operator's work performance and cause a hearing problem. This study was carried out to investigate the cab noise of a selected agricultural tractor. The noise was measured and analyzed in terms of sound and sound intensity levels. Form the results it was known that a structure-born noise was induced from the feet-rest and rear floor panel of the cab. The air-borne noise caused mainly by the engine was transmitted into the operator's position through the small openings of cab structures in the operator's lower front area.