Abstract
Studies of age-related changes in speech perception have shown that older adults experience more problems understanding everyday speech, and require more favorable signal-to-noise ratios when compared with younger adults. Similarly, other studies suggest older adults show poorer temporal processing, especially when the complexity of the signal, the background, or the task is increased. While many age-related differences can be predicted by hearing loss, our studies of older subjects with essentially normal audiometric thresholds suggest that some age-related differences in temporal processing and speech perception in noise persist even in the absence of hearing loss. In addition, it appears that declines in speech perception in noise may follow changes in temporal processing that begin decades earlier. Results from studies of middle-aged subjects will be discussed that suggest age-related changes in auditory processing occur over many decades. [Work supported by NIA-NIH, and the International Center for Hearing and Speech Research, Rochester, NY.]
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