Table 4.

Area under the receiver-operating characteristic (ROC) curves based on the DP-pass and DP-refer reflectance and reflectance area index (RAI) distributions, for various frequencies and frequency regions, based on both the tone-stimulus and chirp-stimulus datasets.

Frequency/Frequency Range (kHz)	Stimulus type	Area under ROC curve
1	Tone	0.82
1.5	Tone	0.88
2	Tone	0.90
3	Tone	0.84
4	Tone	0.76
6	Tone	0.74
Wideband (0.2 to 6)	Chirp	0.86
1 to 2	Chirp	0.90
1 to 4	Chirp	0.90
1 to 6	Chirp	0.86
2 to 4	Chirp	0.87
2 to 6	Chirp	0.83
4 to 6	Chirp	0.78
2	Chirp	0.90