Firewall insulation package simulation and noise auralisation for EV

EV vehicle are now having a great influence on the market, with the number of vehicles sold increasing every year. For the engineer, the introduction of full electric vehicles means new challenges, a change in paradigms and new goals to achieve. One of the new challenges for engineers operating in the EV field is NVH. One of the main components for electric motor noise reduction in an EV vehicle is the firewall treatment. In the following, a method to simulate the firewall behaviour at component level and vehicle level will be discussed. Since the TL is one of the parameters commonly used to evaluate the quality of a treatment, sometimes when talking with designers, this parameter loses a lot of its efficacy. In these cases, auralisation of the noise can give a better idea about the quality of the treatment and the effect on the interior noise.