Analyzing the primary noise of an ANC system which contains narrowband cyeference signal

nonlinear primary path and non-minimum phase secondary path

and exploring the feedback structure based on FIR filter and the feedforward structure based on FLANN filter.By discussing the advantage and the disadvantage of these two structures

we proposed a new hybrid structure in this paper.Proposed FLANN-FIR structure composites the advantages of feedforward and feedback structures

not only the predictable noise can be reduced

but also the unpredictable noise can still be suppressed.Simulations under the cases of different signal noise ratio and different nonlinear primary path demonstrate that proposed hybrid structure performs best on the convergence rate and steady-state property.