Bulldozer noise is an important factor in their development impact. According to China's national standards, superior product index is not greater than the loader bulldozer noise noise is not greater than 85dB, excavators operating noise is not more than the sound of indicators qualified products decibels higher. According to Japan's national standards, bulldozers, loaders noise index for domestic bulldozer driver ear noise, the vast majority are still in the critical current eligibility criteria, namely 97 ds (A) state, which. With the international advanced level in the gap above, with the domestic construction machinery Other machines have a difference of more than that, this situation makes the working environment has always been very harsh bulldozer driver fatigue easily. The current global environmental advocate, the world bulldozer manufacturers are also taking measures to further reduce noise and vibration, we should catch up, dramatically reducing noise cab driver working to improve the environment, improve our bulldozers to participate in international competition strength.