목적: In our previous study, early-blind subjects demonstrated speech recognition advantages over sighted subjects, even in the presence of spectral and temporal degradation. Therefore, this study investigated the impact of age-related hearing loss on auditory performance and neural reorganization in blind subjects, focusing on the dynamics of neuroplasticity in the context of dual sensory deficits. 방법:Four early-blind subjects (73.25 ± 8.02 years; M:F = 2:2) and 12 late- blind subjects (64.17 ± 9.70 years; M:F ratio = 10:2) with moderate to severe symmetric hearing loss were compared with 12 sighted subjects (65.17 ± 9.49 years; M:F = 7:5) in terms of behavioral psychoacoustic tests and neurophysiological assessments. The tests included forward and backward digit span tasks, temporal modulation detection (TMD), spectral ripple discrimination, and speech recognition in noise using the Korean Matrix Sentence Test. Cortical-evoked potentials (N2 and P3b) were measured in response to varying speech-to-noise ratios. 결과:Results revealed that late-blind subjects demonstrated superior performance in the forward span test and TMD thresholds compared to sighted subjects, but no differences were observed between early-blind and sighted subjects. Other psychoacoustic tests, as well as N2 and P3b latencies and amplitudes, showed no significant group differences. 결론:These findings suggest that the benefit of speech recognition in blind individuals may diminish with hearing loss, emphasizing the dynamic and reversible nature of compensatory cross-modal neuroplasticity. This study underscores the importance of early auditory intervention and multimodal rehabilitation strategies to mitigate sensory impairments, particularly in aging populations with combined sensory deficits.