Virtual prototyping in product sound design and in architecture is often done in static situations. A simulated object such as a sound radiating product or a sound-transmitting system (e.g. a room, a building, a vehicle) is evaluated by using standard acoustic descriptors, or it is auralized in a way that sounds are presented in a pure replay situation. In some applications, however, user feedback or user actions are required in the process of quality judgment. Examples are the closing of a car door, the acoustic feedback from a button click or an interactive architectural design process. These examples are in the focus when it comes to real-time applications and Virtual Reality (VR). In this paper we report on the latest developments of our VR system. We present a real-time auralization method, that allows the real-time modification of scenes and considers the dynamic sound propagation across and between rooms. A fundamental feature of the method is that it relies on input parameters obtained by standardized methods - e.g. sound reduction indices for doors and walls. We describe how auralization filters are designed for real-time processing in such cases.
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