Abstract
Elderly adults experience greater difficulties with sound localization tasks involving the precedence effect (PE) than young adults (Cranford et al., 1990). In this study, the echo threshold of the PE and the threshold for detecting the dynamic change in interaural correlation were investigated in 12 young adults and 8 elderly adults with clinically normal hearing. For studying the threshold of detecting the dynamic change in interaural correlation, participants were presented with either binaurally‐uncorrelated or binaurally‐anti‐phase noise fragments, which were inserted in the middle of two interaurally identical (correlated) broadband noise markers (duration=900 ms) delivered by headphones. Either the duration of the noise fragment or the ITD of the noise markers was manipulated. Compared to young participants, elderly participants had both higher echo thresholds and higher fragment‐duration thresholds at various ITDs. The echo threshold was significantly correlated with the fragment‐duration threshol...
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