The microphone shall be located relative to the outlet the farthest from the vehicle &apos; s longitudinal centreline, or, when such outlet does not exist, to the outlet that is highest above the ground.
Le microphone est placé devant la sortie la plus éloignée de l &apos; axe longitudinal du véhicule ou, si celle-ci n &apos; existe pas, devant la sortie la plus haute.