Differences in dummy-head hrtfs caused by the acoustical environment near the head

Filtering of the Head-Related Transfer Functions (HRTFs) is the first and most important part during the perception of directional information in spatial hearing. A computer-controlled dummy-head measurement system was installed in an anechoic room with 1 degree horizontal and 5 degrees vertical resolution. Differences in the measured HRTFs caused by changes of the acoustical environment near the head are calculated. Effects of "everyday objects" like caps, hair, glasses and clothing on the fine structure of the HRTFs are presented.