The main objective of the current study was to explore and propose new sound level limits at a Euro 5 step of L-category vehicles, taking into account the evolution of sound levels of approved vehicle types, the citizens' needs, and the technical and economic feasibility in the medium term range.

This is the final report of the project entitled "Study to prepare the adaptation to technical progress of EU requirements on silencing systems containing acoustically absorbing fibrous materials for vehicles of categories M1,M2,M3,N1,N2,N3", related to the usage of acoustically absorbing...