Source: https://www.bruitparif.fr/pages/En-tete/700%20Accompagner/700%20PPBE%20en%20IdF/500%20Autres%20ressources%20documentaires/2008%202008%20-%20R%C3%A9f%C3%A9rentiel%20national%20pour%20la%20d%C3%A9finition%20et%20la%20cr%C3%A9ation%20des%20zones%20calmes%20-%20CRETEIL%20MEDDAT.pdf