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10:30 - 11:00



SA-3:  Modifying the virtual acoustical room size in an (CAVE) echoic environment

Auralization of the environments (virtual or real) is based on the modelling or measurement of the room impulse response. Impulse response of a room contains information about the room size and room dimensions. The late reverberation part of the impulse response characterizes mainly the room size. Therefore it is possible to modify the room size with shortening or reshaping the impulse response. At the same time in various virtual environment applications, it is possible to observe that the handling with long impulse responses in real time can be computationally intensive. In such cases, the shortening the room impulse can be beneficial. However the shortening of the room impulse is not a straight forward process, because of the artefacts. In this study, an investigation was conducted in a WFS-based virtual environment which allows simulating various room reflections. The results show that even abrupt shortening of the room impulse responses does not cause audible artefacts, if additional room reflections are generated using artificial delays. This approach might be promising for particularly CAVE applications.

Ercan Altinsoy (TU Dresden), Sebastian Merchel (TU Dresden)