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. Author manuscript; available in PMC: 2018 Mar 1.
Published in final edited form as: Hear Res. 2017 Feb 4;346:45–54. doi: 10.1016/j.heares.2017.02.001

Figure 6.

Figure 6

AC (left-hand panel) & BC (right-hand panel) ABR thresholds of 5 age groups each of ten to twelve BALB/c mice plotted as medians and interquartile ranges (IQR) as a function of frequency. Thresholds in 49-56 day-old CBA/CaJ mice are included for comparison. Also included are the means of 5 measurements of the maximum stimulus level achievable when the sources were driven by a 10 volt stimulus. The maximum varied by ± 5 dB from ear to ear dependent on the coupling of the source to the animal. The BC maximum stimulation limit or ceiling was a hard and constant upper limit in our measurements. The AC stimulus ceiling was more arbitrary and usually 80 dB SPL, which was selected to prevent damage to the inner ear. When threshold events where not visible at the stimulus ceiling, the threshold was coded as 5 dB above the ceiling. In order to reduce symbol overlap, some of the data points are shifted along the frequency axis.