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Results from subjective and select objective measures suggest sustained speech-processing demands can lead to mental fatigue in persons with hearing loss. It is important to note that the use of clinically fit hearing aids may reduce listening effort and susceptibility to mental fatigue associated with sustained speech-processing demands. The present study design did not reveal additional benefits, in terms of reduced listening effort or fatigue, from use of directional processing and digital noise-reduction algorithms. However, experimental design limitations suggest further work in this area is needed. Finally, subjective and objective measures of listening effort and mental fatigue due to sustained speech-processing demands, were not strongly associated, suggesting that these measures may assess different aspects of listening effort and mental fatigue.
Benjamin W. Y. Hornsby (Wed,) studied this question.