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将噪声源、消声管路和外界组成一般排气系统，对消声器消声特性进行计算，运用传递矩阵法给出了消声器插入损失的数学模型，分析了消声器内压力的损失及消声器目标消声量的频带特性对消声器优化设计的影响，提出并建立了兼顾消声器各项设计要求的新优化设计模型．运用 Ｂｏｒｌａｎｄ Ｃ＋＋和 Ｍａｔｃｌａｂ对新优化设计模型进行了计算，并编制了优化软件，最后对计算模型的预测精度和优化效果进行了试验室动态试验，证实计算和新建优化模型是正确可行的．
The noise source, muffler pipeline and the outside world are composed of general exhaust system, the muffler muffler characteristics are calculated, the mathematical model of the muffler insertion loss is given by the transfer matrix method, and the loss of muffler pressure and muffler target muffling volume The band characteristics of the optimal design of muffler, put forward and established a new optimization design model taking into account the design requirements of the muffler. By using Borland C ++ and Matclab, the new optimization design model was calculated and the optimization software was compiled. Finally, the laboratory dynamic test was conducted on the prediction accuracy and optimization effect of the calculation model. It is proved that the calculation and the new optimization model are correct and feasible.