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本文分析了摩托车发动机排气噪声产生的机理，阐述了排气消声器的基本参数对消声效果的影响，系统地论述了摩托车发动机排气消声器的设计方法，给出了评价多级扩张式消声器消声量的传递损失计算公式。
This paper analyzes the mechanism of engine exhaust noise of motorcycle and expounds the influence of the basic parameters of exhaust muffler on the effect of noise reduction. The design method of motorcycle exhaust muffler is discussed systematically. The muffler muffler transmission loss calculation formula.