Acoustic design is a relatively new discipline of design, viewing sound environmental questions in a qualitative perspective rather than the prevailing quantitative perspective. A difficult question the acoustic designer has to face is how to communicate the qualities of a sound environment. One of the few possible solutions is to use auralizations and audible simulations. Therefore the acoustic designer has great need of an auralization system in his toolbox. This raises a number of questions. Available auralization systems are targeted towards the expert user such as acousticians, are this systems directly usable for the acoustic designer. What are the special requirements of auralization tools targeted towards designers such as architects and city planners? What is feasible with the current technology and what are the research challenges to fulfil the requirements of such a toolbox. Another important question is: what are the demands of the quality of the listening experience and the listening space where the auralizations and simulations are perceived.