Senior executives of PSA Peugeot-Citroen, the Renault group and the Conservatoire National des Arts et Métiers (CNAM), on Tuesday inaugurated two automobile aeroacoustic wind tunnels, two years after the three companies founded Souffleries Aéroacoustiques Automobiles (S2A), a consortium designed to establish a so-called 'centre of excellence' for automobile aerodynamics in France.