Age-related differences in binaural masking level differences: behavioral and electrophysiological evidence

Journal of Neurophysiology
Samira AndersonMatthew J Goupell

Abstract

The effects of aging and stimulus configuration on binaural masking level differences (BMLDs) were measured behaviorally and electrophysiologically, using the frequency-following response (FFR) to target brainstem/midbrain encoding. The tests were performed in 15 younger normal-hearing (<30 yr) and 15 older normal-hearing (>60 yr) participants. The stimuli consisted of a 500-Hz target tone embedded in a narrowband (50-Hz bandwidth) or wideband (1,500-Hz bandwidth) noise masker. The interaural phase conditions included NoSo (tone and noise presented interaurally in-phase), NoSπ (noise presented interaurally in-phase and tone presented out-of-phase), and NπSo (noise presented interaurally out-of-phase and tone presented in-phase) configurations. In the behavioral experiment, aging reduced the magnitude of the BMLD. The magnitude of the BMLD was smaller for the NoSo-NπSo threshold difference compared with the NoSo-NoSπ threshold difference, and it was also smaller in narrowband compared with wideband conditions, consistent with previous measurements. In the electrophysiology experiment, older participants had reduced FFR magnitudes and smaller differences between configurations. There were significant changes in FFR magnitude betw...Continue Reading

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Citations

Dec 5, 2019·The Journal of the Acoustical Society of America·Sean R AndersonMatthew J Goupell
Jul 10, 2020·Journal of the Association for Research in Otolaryngology : JARO·Samira AndersonMatthew J Goupell
Aug 3, 2019·The Journal of the Acoustical Society of America·Benjamin H ZobelDeniz Başkent
Dec 22, 2020·International Journal of Audiology·Won So, Spencer B Smith

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