Figure 2

Automated method detects accurate and consistent hearing threshold levels. A. Summary data showing that automated detection with a signal-to-noise ratio value of four (SD ± 4) predicts equivalent and consistent threshold levels in comparison to visual estimation for click and tone (16 kHz) stimuli. B. The variability associated with visual estimation is evident as the absolute difference in threshold values between two observers was statistically different than zero for click (* p < 0.05) and tone stimuli (**p < 0.001). Values expressed as mean ± SEM for all graphs with number of animals indicated within columns.