As far as the measurement of noise from railway lines is concerned, it would have been good if we could have had another parameter for this, as noise from railways is perceived differently to that from motorways or airports.
En ce qui concerne la mesure sur les voies ferrées, il aurait été souhaitable de disposer d' un autre paramètre, car le bruit généré par les trains n' est pas perçu de la même façon que celui des autoroutes et des aéroports.