FIG. 12.

Decreasing OHC gain as noise level increases can maintain the dynamic range for discrimination in noise across a wide range of masker levels. Data points at 50 dB are not connected because “optimal” gain could not be estimated precisely due to ΔG being limited to the range between 0 and −40 dB. A The optimal ΔG, in dB, is nearly linearly related to noise level in dB SPL. B The dynamic range (pooled across all spontaneous rate groups, see Fig. 11) is plotted as a function of noise level for conditions with (solid) and without (dashed) OHC gain reduction, i.e., with or without the simulated MOCR.