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This paper compares the application of a non-intrusive on-site component Transfer Path Analysis (TPA) method used to identify interface forces to a previously performed direct blocked forces measurement. The latter is the current practice for determining the load cases related to isolated vehicle components. Force transducers are placed between the investigated source component and a specific rigid measurement rig. The comparison presented aims to answer the question of whether the faster and cheaper TPA method can produce accurate enough interface forces. The TPA method used in this work calculates the force component contributions without disassembly of the interfaces and through the local stiffness of multiple indicator positions per interface combined with operational measurement. The method is based on the application of an inverse matrix model. This approach is applied to a vehicle road noise investigation carried out on a roller bench at different roller speeds.

The main advantages of electric LDT's, (Light-duty Trucks), namely: lower running and maintenance costs, zero-emissions and eco-friendly image heavily outweigh their disadvantages, specifically their higher charging time compared to ICE (internal combustion engine) vehicle refuelling and their shorter range. These advantages make electric LDTs viable because they are compatible with the driving cycles of fleet customers. Noise generated by electric LDTs is expected to be low compared to ICEs; however, the interior and exterior noise has high-frequency noise components that are usually subjectively perceived as unpleasant or annoying. The tonal components present in electric vehicles are judged as unpleasant by the vehicle's occupants, and other noise components that are usually masked by the ICE are clearly perceived, as the overall noise is lower.