Estimates of frequency tuning of AN single fibers in humans.

Estimates of sharpness of frequency tuning in single AN fibers of human (red) compared with single-fiber tuning of macaque [24] (blue) and other animal models (hatched area), and with other measures of human frequency tuning (green: dotted line, SFOAE [5]; dashed line, psychophysics [4]; both are converted from QERB with conversion factor 0.52). Red solid line: human estimate using conversion curve averaged across 3 species; red dashed line: estimate solely based on conversion curve of macaque. The hatched area outlines data for cat (archival data from our laboratory) and 4 other species [8]. Data provided in S1 Data. AN, auditory nerve; CAP, compound action potential; QERB, quality factor of Equivalent Rectangular Bandwidth; SFOAE, stimulus-frequency otoacoustic emissions.