Abstract: Identifying the contribution of different noise sources is a major step in reducing the impact of moving noise sources. To analyze the transient characteristics and their contribution of multiple moving noise sources, a method of time-domain transfer path analysis(TPA) is proposed. The dynamic transfer path model and transfer matrix calculation method are introduced. Instead of transfer function, the pulse response function is used to analyze the time varying characteristics of the system, and a non-linear time method is used to process the Doppler-effect of the signal transmission. Simulation with three point sources is used to compare the identification results of the time-domain TPA and frequency-domain TPA. The application of the time-domain TPA is used to the identification of the pass-by noise source of a bus. The simulation and the application results show that time-domain TPA could be used to analyze the contribution of moving noise sources, and it takes less computational effort compared with frequency-domain transfer path analysis(FTPA)

Key words: Time-domain identification, Transfer path analysis, Transient characteristics