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对长春４０拖拉机驾驶室采取吸声材料吸声、阻尼材料减振和合理选择驾驶室的橡胶弹性支承后，过驾驶员耳旁纵向各测点的线性声压级最大降低了５．８１ｄＢ，驾驶员耳旁噪声的Ａ声级降低了５．６５ｄＢ（Ａ），取得了较好的降噪效果。
On the Changchun 40 tractor cab to take the sound absorption material damping, damping material damping and a reasonable choice of the cab rubber elastic support, the pilot’s ear next to the vertical measurement point of maximum linear sound pressure level decreased by 5.81dB, driving The A sound level of the noise near the ear of the ear is reduced by 5.65dB (A), and a better noise reduction effect is achieved.