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Transcripción del abstract original del autor: As reference to the ISO 14001 standard on environmental management, Gaz de France is taking actions to decrease the impact of the gas industry on the environment. In this context, the software LEOPARD has been developed by both R&D Division of Gaz de France and METRAVIB RDS to estimate sound nuisances of pressure regulating stations (PRS). LEOPARD is a computing tool geared to assist the conception, optimisation and acoustical diagnostic of the 4000 PRS at the Transmission Division (network and customer PRS). Due to the expansion of both the urban areas and the network, PRS are located closer and closer to habitations. Thanks to LEOPARD and respecting its environmental–oriented policy, Gaz de France can provide with gas any location for the comfort of customers. As a matter of fact, LEOPARD can compute the sound generated by a PRS taking into account its operating conditions. A second module in the software deals with radiated sound taking into account surrounding elements (PRS enclosed or not, installation of a screen, surrounding reflectors, type of soil). The outputs of LEOPARD are given in the form of spectra and global sound levels heard at any location around the PRS. LEOPARD is validated with field measurements and claims an accuracy of ± 3 dBA. LEOPARD can be easily adapted to any type of regulator, provided its acoustical response is measured. LEOPARD has been developed to be used by a wide range of people within Gaz de France, most of whom are non specialists in acoustics. Consequently, a special effort has been made to create user-friendly interfaces, to make the user autonomous and get quick answers to his/her acoustical relative problems.