On the direct measurement and interactive 3D rendering of dummy-head directional characteristics using polar coordinates

Authors: György Wersényi, József Répás, Michael Graf

Abstract:

HRTF measurements usually incorporate with dummy-heads, broadband excitation signals and automated installations for recording and plotting results as function of frequency and direction in the so called 3D "hoop" coordinate system. Plotting results in different coordinate systems or along different axes (such as the interaural axis) requires further calculations. This paper presents an automated measurement system for direct recording and evaluation of dummy-head HRTFs in a polar coordinate system. Color plots using different scales show directional dependence of the transmission and image processing methods are introduced for interactive 3D rendering of the measured dataset (cloud) for visualization and further analysis.