FIG. 3.

(Color online) Individual fusion range results (solid lines) and frequency-discrimination limens (filled boxes) plotted by subject; each panel shows results for one reference frequency. Horizontal dotted lines in each panel represent the reference frequencies (0.375, 0.75, and 1.25 kHz for subject HI32 and 1, 2, and 3 kHz for the other eight subjects). Vertical solid lines indicate fusion ranges, and the open squares at the top and bottom of each line indicate that fusion ranges may exceed the upper or lower limits of the frequency range tested, respectively. Filled boxes to the left and right of the fusion range results (solid lines) show FDLs in the left and right ears of each subject, respectively. Error bars at the top and bottom of the filled boxes indicate standard deviations of FDLs around the mean thresholds above and below the reference frequencies, respectively.