Group-mean sentence-intelligibility scores and standard errors of the mean for each condition. The unprocessed, direct-sound-algorithm, and reverberant-algorithm conditions are represented by separate columns, as in Figs. 4 and 5. Means for the normal-hearing (NH) and hearing-impaired (HI) listeners are presented separately. Note the different target-to-interferer ratios required across the two listener groups. ns = nonsignificant, (*) p < 0.05, (**) p < 0.01, (***) p < 0.001.