1. The purpose of the testing described in Annex 10 to regulation No. 51 is to address the noise sources of the vehicle, which are of substantial importance for the further reduction of the overall noise emission of the vehicle during urban driving conditions, by means of a test performed on a test site.
1. L &apos; essai décrit à l &apos; annexe 10 du Règlement no 51, effectué sur un banc d &apos; essai, vise à étudier les sources de bruit du véhicule, qui sont d &apos; une importance cruciale lorsqu &apos; il s &apos; agit de mieux réduire le niveau sonore global en conduite urbaine.