FIG. 3.

Individual results for the masking conditions: no masker (NM), single-pulse masker (SPM), low-rate pulse train masker (LTM), and high-rate pulse train masker (HTM), for each electrode position (apical and middle). The average of all amplitude estimates in the NM condition is shown as a solid horizontal line, and two times the standard deviation (σ) below that as a dashed horizontal line. The noise floor, which was defined when 25% or less traces were valid eCAP responses, is shown as a shaded area. Pulse train maskers were presented at the same physical current level (Φ), corresponding to a current level evoking comfortable loudness for HTM. SPM was always presented at current levels equal to those of LTM. Electrophysiological forward masking (eFM) was measured using eCAP amplitude estimates as a function of the masker-probe interval (MPI). Fitted exponential models of the eCAP recovery functions are only shown when eFM occurred. Psychophysical forward masking (pFM) results are shown as shifts in the probe detection threshold (PDT) at an MPI of 16 ms. Error bars indicate the standard error of the mean. Note that the ordinate is inverted.