Figure 1.

Spectral profiles as a function of frequency for seven different locations in the frontal portion of the azimuthal plane. The spectral profiles are from right ear HRTF recordings of KEMAR. The same line styles are used for ipsilateral and contralateral locations; however, the linewidth for ipsilateral locations is wider than for contralateral locations. In the psychophysical experiments, the overall differences are reduced by normalization and level randomization, forcing the subjects to rely on differences in the spectral shapes.