Extended tools for simulated impulse responses

Abstract

To calculate impulse responses is already done since more than 25 years. The routines did allow simple calculations without and now always with scattered sound components. Today, sophistic routines calculate frequency-dependent full impulse responses comparable with measured ones. Parallel to this development, auralization routines have been developed first for monaural and binaural reproduction and nowadays ambisonic signals are created in B-Format of first and second order. These signals make audible during the reproduction in an ambisonic playback configuration the distribution of wall and ceiling reflections in computer models in EASE. Beside the acoustic detection of desired or unwanted reflections, which always is asking for the correct reproduction of the ambisonic signals the visualization of the reflection distribution is desired. In EASE, a new tool has been implemented to correlate the reflections in an impulse response with their position in a 3D presentation. This new hedgehog presentation of full impulse responses correlates angle-dependent with the view position of the model. So, any wanted or unwanted reflections may be identified quickly. A comparison with ambisonic signals via auralization is possible.