TABLE II.

Results of quantitative microstructure analysis. Columns indicate the pair number, SOAE status (present+ or absent−), microstructure depth between adjacent extrema (in dB), spacing between adjacent extrema (in octaves), the average SD between the interpolated and smoothed data, and the microstructure status (present or absent) of each subject using a 5 dB depth criterion. Bolded values in the depth column highlight depths ≥5 dB.

Pair number	Subject SOAE status (+ or −)	Depth (dB)	Spacing between maxima (octaves)	SD (interpolated and smoothed data)	Microstructure status (present or absent)
1	+	5.608	0.030	0.095	Present
1	−	2.342	0.017	0.074	Absent
2	+	8.182	0.266	0.089	Present
2	−	N/A	N/A	0.055	Absent
3	+	6.294	0.035	0.111	Present
3	−	4.524	0.025	0.174	Absent
4	+	11.055	0.044	0.134	Present
4	−	2.21	0.023	0.070	Absent
5	+	11.875	0.052	0.082	Present
5	−	3.681	0.017	0.178	Absent
6	+	7.182	0.017	0.156	Present
6	−	3.30	0.019	0.218	Absent
7	+	6.677	0.021	0.210	Present
7	−	3.83	0.016	0.169	Absent
8	+	12.887	0.038	0.254	Present
8	−	1.181	0.020	0.056	Absent
9	+	13.77	0.029	0.247	Present
9	−	3.491	0.021	0.151	Absent
10	+	11.654	0.037	0.154	Present
10	−	N/A	N/A	0.094	Absent
11	+	14.772	0.029	0.286	Present
11	−	3.328	0.026	0.117	Absent
12	+	12.3	0.029	0.222	Present
12	−	N/A	N/A	0.162	Absent
13	+	13.649	0.024	0.227	Present
13	−	1.02	0.020	0.042	Absent
14	+	5.721	0.020	0.202	Present
14	−	N/A	N/A	0.153	Absent
15	+	N/A	N/A	0.270	Absent
15	−	1.553	0.015	0.127	Absent
16	+	6.757	0.020	0.146	Present
16	−	N/A	N/A	0.117	Absent
17	+	14.818	0.040	0.204	Present
17	−	N/A	N/A	0.067	Absent
18	+	N/A	N/A	0.167	Absent
18	−	N/A	N/A	0.055	Absent