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The interaural level difference (ILD) spectrum along azimuth and elevation. (A) ILD gain across spatial locations, calculated for each of the conditions (mouth closed, animal 0006F264B5; mouth open, animal 0006F26A75; water surface, animal 0006F2279C), is relatively flat within the animal's hearing range. (B) Comparison between the three conditions and a spherical head model at 90 deg azimuth.
