Skip to main content
. Author manuscript; available in PMC: 2013 Jun 3.
Published in final edited form as: Hear Res. 2010 May 27;268(0):105–113. doi: 10.1016/j.heares.2010.05.006

Table 3.

Frequency difference limens (DF) and Weber fractions for CI subjects at 500, 1000 and 3000 Hz base frequency. Results for NH subjects are presented for comparison at 1000 Hz. SEM refers to the standard error. N refers to the number of subjects with a valid trial included in each group. For any given frequency only the last valid trial was used. Weber fractions and extrapolated DF’s for adults were obtained from Wier et al. (1977).

Group Frequency (Hz)
500 1000 3000
CI < 10 DF (Hz) ± SEM 130 ± 68 156 ± 36 392 ± 113
Weber (DF/F) ± SEM 0.26 ± 0.14 0.16 ± 0.04 0.13 ± 0.04
N 11 13 11
CI > 10.1 DF (Hz) ± SEM 29 ± 9 55 ± 26 220 ± 69
Weber (DF/F) ± SEM 0.06 ± 0.02 0.06 ± 0.03 0.07 ± 0.02
N 9 10 9
NH < 10 DF (Hz) ± SEM 218 ± 85
Weber (DF/F) ± SEM 0.22 ± 0.08
N 36
NH > 10.1 DF (Hz) ± SEM 9.1 ± 2.6
Weber (DF/F) ± SEM 0.009 ± 0.002
N 21
Adult DF (Hz) ± SEM 1.5 2 9
Weber (DF/F) ± SEM 0.003 0.002 0.003
*extrapolated from Weir 1977