Table 4
Features remaining after pre-screening according to criterion 
. Each row represents equivalent features in the frequency bands stated in Section 3.1, with an entry in the table indicating that a particular feature in a particular band passes the pre-selection criterion. Letters and colors represent the clusters resulting from the procedure described in Section 4.2.2. Cluster colors correspond to Figure 1.
| Feature name | Bands (cluster) | Description | ||||
|---|---|---|---|---|---|---|
| B | 0 | 1 | 2 | 3 | ||
| diff_mean | (C) | (C) | (C) | (C) | Mean diffuseness | |
| doaEl_mean | (B) | (B) | Mean vertical elevation | |||
| niacc_mean | (D) | (D) | Mean normalized inter-aural cross-correlation (IACC) | |||
| itd_mean | (H) | Mean inter-aural time difference (ITD) | ||||
| sphDI_mean | (C) | (C) | (C) | (C) | Mean spherical directivity index | |
| sphDIAz_mean | (C) | (C) | (C) | (C) | Mean horizontal spherical directivity index | |
| sphDIEl_mean | (B) | Mean vertical spherical directivity index | ||||
| sphGPRatio_mean | (F) | Mean spherical gradient/pressure ratio | ||||
| sphGRatio_mean | (F) | Mean spherical gradient ratio | ||||
| sphPRatio_mean | (F) | Mean spherical pressure ratio | ||||
| doaAz_var | (C) | (E) | (C) | (C) | (A) | Variance of horizontal direction of arrival (DOA) |
| doaEl_var | (C) | (C) | (C) | (A) | Variance of vertical DOA | |
| itd_var | (G) | Variance of ITD | ||||
| sphDI_var | (A) | Variance of spherical directivity index | ||||
| sphDIAz_var | (A) | (A) | Variance of horizontal spherical directivity index | |||
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