FIG. 4.

Example fusion pitch match results for subject HI25. Each column shows results for one reference frequency. In the upper panels, the 50% points of the fusion pitch match functions (open circles; see legend inset in top left panel) along with the standard deviations (overlaid vertical lines) are shown. Note that the error bars are smaller than the symbol size. Solid horizontal lines show the interaural pitch match 50% points, with standard deviations shown as error bars at the right end of the horizontal lines. Asterisks indicate pitch averaging, i.e., no overlap with either the pitch match 50% point or the pair-tone frequency. Diagonal dashed lines indicate the 1:1 relationship between the pair frequency and pitch-matched frequency. In the middle row panels, FPIs [see Eq. (1)] are shown as a solid line. Vertical dashed dotted lines indicate the lower (20%) and upper (80%) limits of the pitch averaging range. The 80% upper limit for the 3-kHz reference was not shown due to the limit on the frequency range tested (right middle panel). Shaded bars below the FPI functions indicate the pitch averaging trend, with the thin vertical white line indicating the reference frequency, dark gray shading indicating pitch averaging, and light gray shading indicating lower pitch dominance. In the bottom panels, the 25%–75% range of the fusion pitch match functions (shaded boxes; see legend inset in top left panel) along with standard deviations (error bars) are shown. The horizontal lines inside the boxes show the 50% points. A sample psychometric function in the left bottom panel illustrates the locations of the 50% point and 25%–75% range on the psychometric function.