Abstract: For the problem that the correctness and accuracy of the offline secondary path model for active vehicle interior noise control are difficult to guarantee and the validity of the linear time-invariant hypothesis of the secondary path lacks verification,a method of secondary path modeling and verification is proposed. Firstly, through the secondary path dead time delay measurement and the offline secondary path model identification, the high-precision modeling of the secondary path is realized under the linear time-invariant assumption of the secondary path. Then, using the sweep frequency signal as the input, the secondary path model is tested offline in the target frequency band to validate the correctness and accuracy of the model. Finally, with the random signal as the input, some loudspeakers as the excitation source to stimulate the interior noise and the remaining loudspeakers as the secondary source to control the noise, the correctness of the secondary path model and the validity of its linear time-invariant hypothesis are tested

Key words: vehicle interior noise; secondary path modeling; secondary path validation; active noise control