Figure 1.

A, Schematic illustration of the tone patterns. Stimuli were triplets composed of low (black rectangle) and high sinusoidal tones (white rectangle). Left, The same tone pattern was presented to both ears in the binaural condition. The two variants are depicted separately at the top and the bottom. Right, Different patterns were simultaneously presented to the left and right ears in the dichotic condition. Frequent standard triplets were interspersed with one of three rare deviant triplets: (1) proximity, (2) reversal, and (3) first-tone deviant. Tone timing is marked under the first variant of tone patterns presented in the binaural condition shown in the upper left corner. B, Map of electrodes selected for the ROI analysis.