The object of this research is to define, implement and to integrate the model of an acoustic performance evaluation aided system. The evaluation will be carried out during the preliminary design stage in relation to a Computer Aided Design process applied to building. The different steps of development involve : a- The definition of a global design methodology which takes into account the different design components. b- The elaboration of an acoustic evaluation model which would determine the sound level, the prescribed insulation, the achieved insulation and the level of quality attributed to each component of the building. c- The search for compromise between the selected design methodology and the proposed implementation technology. This approach will allow to elaborate a system obeying the implementation constraints and meeting at best the acoustic evaluation requirements during the preliminary design stage. The following realisations corresponding to the different stages of the research are to be emphasized : 1- ECHO: a conversationnal automatic evaluation tool. 2- SONARE: an evaluation system elaborated in an environment of specialized Computer Aided Design applied to building. 3-SONO: evaluation aided Expert System implemented in an environment of specialized Computer Aided Design applied to building. The research work allowed us to propose the architecture for an intelligent evaluation system named DELTA-DIALOG through which a more advanced Man/System relationship can be established.