Figure 4.

Left panel: Mean ± 1 SE of the tip-to-tail pressure-level difference of the SFOAE suppression tuning curve as a function of probe frequency. Each curve represents different probe levels (L_p) specified as SPL. Each curve is slightly displaced along the horizontal axis to improve clarity. Right panel: Mean ± 1 SE of the tip-to-tail power-level difference of the SFOAE suppression tuning curve as a function of probe frequency with similar plotting conventions. The SE values quantify the variability power-level differences but not including the variability of L_G that was used to calculate power-level differences. L_p is specified as SPL in the column of numbers just to the left of 4 kHz that labels each equal-SPL contour (i.e., each solid-line curve). L_p is also specified as absorbed-power level in the row of numbers along the horizontal probe frequency axis for the 50 dB SPL contour. L_p at 4 kHz on this contour has a SPL of 50 dB and absorbed-power level of 50 dB. The dashed lines between 4 and 8 kHz connect the tip-to-tail power level differences at approximately equal absorbed-power levels of L_p (±1 dB).