The acoustical transfer function and transfer loss of exhaust muffler can be obtained by using chirp signal as excitation at the inlet of exhaust muffler.

• 采用适当的人工边界条件来描述排气口外部的半无限空间，通过进气口端正弦扫频激励，可求得出口端的响应，从而获得该排气消声器系统的传递函数和传声损失。