Table 3.

Features defined for the configuration classification models.

	Description
1	Slope of the line of best fit
2	Proportion of positive slopes joining consecutive thresholds
3	Proportion of negative slopes joining consecutive thresholds
4	Maximum threshold (worst threshold)
5	Minimum threshold (best threshold)
6	Average threshold
7	Standard deviation of the thresholds
8	Average of thresholds in the low frequency range (below 1,000 Hz)
9	Average of thresholds in the mid frequency range (between 1,000 Hz and 3,000 Hz)
10	Average of thresholds in the high frequency range (4,000 Hz and above)
11	Proportion of slopes that change signs with respect to the previous slope
12	Mean absolute residual from the line of best fit
13	Audiogram curvature; highest-order coefficient of the quadratic of best fit
14	Audiogram range; difference between the maximum and minimum thresholds
15	Notch index44