Aging raises temporal-processing thresholds more than level-based thresholds

Evidence

The left four columns of panels of Fig. 1 compare the performance of the four basic tasks (ITD, ILD, TIME , and LEVEL ) between listener groups. For the low-frequency stimulus (the upper row of panels in Fig. 1 ), a one-way analysis of variance indicated a statistically significant effect of listener group in the TIME task only. Subsequent pair-wise comparisons indicated higher thresholds for the ENH and EHI listeners than for the YNH listeners. For the high-frequency stimulus (the lower rows of panels), a significant effect of listener group was found in the ITD, TIME , and LEVEL tasks. These results reflect higher thresholds for EHI than for ENH (ITD task); for ENH and EHI than for YNH (TIME task); and for ENH than for YNH (LEVEL task). The listener-group effect was not significant for the ILD task for either stimulus type. — Dijk, Pim van, Physiology, Psychoacoustics and…, 1064