Vehicle Sound Engineering by Modifying Intake / Exhaust Orifice Noise Using Simulation Software

Apart of other aspects, the interior sound of a passenger car brand has to meet customer expectations. For optimizing the sound of a passenger car, target sounds have first to be established via the operating range of the vehicle. For an effective sound engineering approach an objective description and evaluation of vehicle interior sound is beneficial. Such an objective description guarantees the effective and reproducible implementation of the required brand sound in the vehicle development process.

In such a process it is necessary to reduce on the one hand annoying undesired noise aspects and to create on the other hand the relevant and necessary noise parameters to meet the target sounds head on. This can only be done in defining for the different vehicle components individual targets from above results which lead to a combined approach of modifying the vehicle noise sources, the chassis, the sound package and by optimizing intake and exhaust noise for finally creating the required vehicle interior sound. This ensures that these vehicles will then be readily accepted by the target group of passenger car drivers.

In this presentation, software tools for supporting the sound engineering approach will be presented with special emphasis on intake and exhaust orifice noise modification.