Impedance composite silencer

The utility model provides an impedance combined type silencer. The impedance combined type silencer comprises a silencer outer shell, a turbine fan assembly, a partition plate structure, a honeycomb aluminum core and a motor. The turbine fan assembly is installed at the position, close to the inlet, in an inner cavity of the silencer outer shell. The turbine fan assembly is connected with an output shaft of the motor. A contraction chamber shell, a mixing chamber shell and an expansion chamber shell are sequentially fixed and communicated in an inner cavity of the silencer outer shell from an inlet to an outlet, and wall plates on the two sides form a pipeline with the suddenly-changed sectional area, so that the structural acoustic impedance of the silencer is increased, reflection and interference of noise waves are generated, and tail gas noise is reduced. The partition plate structure is fixed to the position, close to an outlet, in an inner cavity of the silencer outer shell, the honeycomb aluminum core