Study on Vibration and Noise Reduction of Tractor Cab (Part 4)

Effect of Actual Cab Suspension on Vibration and Noise Reduction

Abstract

An actual cab suspension system was designed and constructed based on the study results about the effect of model cab suspension on vibration and noise reduction. The effect of actual suspension was investigated at the state of where the air borne sound and resonance existed, too. As the results the vibrations of the cab were repressed by the suspension. The sound pressure level in the cab was reduced but it showed a slight higher value than that of fixed cab at some engine speeds. The noise level was reduced only a little because of high frequency components of sound. But the big reduction of sound pressure level in low frequency domain under 200Hz indicated that the cab suspension system had an obvious effect on reducing the solid borne sound.