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Figure 5: Standard deviations of repeated thresholds measured with a headphone Sennheiser HDA 200: (a) at conventional audiometry, (b) as "means" of subjects' intra-individual standard deviations over the six measurements in this study (in fact the square roots of the means of the variances), for the control group (N=23, dashed lines) and the NAC group (N=11, solid lines). Circles = right ear, crosses = left ear

Figure 5: Standard deviations of repeated thresholds measured with a headphone Sennheiser HDA 200: (a) at conventional audiometry, (b) as N=23, dashed lines) and the NAC group (N=11, solid lines). Circles = right ear, crosses = left ear">