Time-domain transfer path analysis of automobile interior noise

Compared with the traditional transfer path analysis(TPA) in frequency domain, the time-domain TPA can playback noises and their path contributions, and further analyze their sound quality, so that the noises and their path contributions can be understood and grasped more intuitively and comprehensively. Here, based on the structure-borne noise impedance matrix method and the airborne noise source substitution method, a time-domain TPA method was presented to analyze the automobile interior noise including structure-borne noise and airborne one, and its implementation process was illustrated in detail. Furthermore, a time-domain TPA model was built to analyze the copilot position noise caused by an engine. The results showed that the contribution of structure-borne noise is significantly greater than the contribution of airborne noise during the engin's whole run-up and run-down process, the right upper mount and the left upper mount are the main transfer paths and their higher path FRFs are the root causes of large contributions. The results pointed out a direction for the establishment of subsequent noise control schemes. ©, 2015, Chinese Vibration Engineering Society. All right reserved.