Effect of spectral ripples in the source spectrum on sound localization performance in the median plane. Right-most bottom panel: localization error rates obtained without spectral ripples serving as reference. Top and bottom left panels: Differences to the reference condition shown in the right-most bottom panel. In addition to predictions from the two model variants (MP and GP), predictions from reijniers2014 [6] and baumgartner2014 [15] as well as actual data from [33] (data_macpherson2003) as shown. Note that ripple densities were varied at a fixed ripple depth of 40 dB and ripple depths were varied at a fixed ripple density of one ripple per octave.