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Average a diotic FMDLs and b diotic AMDLs for young (age < 30; gray) vs. old (age ≥ 60; black) participants. Circles correspond to the present data, measured for a 500-Hz carrier at slow (f m = 1 Hz) and fast (f m = 20 Hz) modulation rates. Squares correspond to average FMDLs from Schoof and Rosen (2014), measured for a 1-kHz carrier at a 2-Hz modulation rate.
