Figure 2.

Geometric-mean magnitude estimates as a function of level for all eight conditions (see bottom-right inset). The vertical bars show the standard errors of the mean for each point. Monaural/binaural function pairs are offset from one another arbitrarily vertically and equal-SPL points are offset horizontally to increase readability. Despite this offset, all data points represent measurements at 25, 40, 55, 70, or 80 dB SPL. Average binaural-to-monaural ratios and the standard errors (shown in parentheses) for binaural-to-monaural ratios across listeners are shown in the top left for the four pairs of functions.