Figure 2.

GOM functions for off-frequency (open symbols) and on-frequency (filled symbols) precursor conditions. Circles indicate thresholds obtained when the signal level was fixed and masker level varied. Hourglasses represent thresholds obtained when the masker level was fixed and the signal level varied. Asterisks show each subject’s signal threshold with no masker or precursor (the symbols are arbitrarily placed at 40-dB masker level). Plus symbols show signal threshold in the presence of an on-frequency precursor with 20 ms of silence in place of the off-frequency masker. Dashed lines are model fits described in the text.