Table 6

Effect of feature variations on MAEs and RMSEs in the ITD predictions of Model 3. The errors were calculated by evaluating the predictions of Model 3 using inter- and intra-individual variations when extracting the selected anthropometric and HA features from participant 18 (female) multiple times, see Table 3, in comparison to measurement-based ITD estimations. Deviations with respect to the mean MAEs and RMSEs, cf. Table 4, are indicated by Δμ, with percentage deviations provided in brackets.

Inter-individual extractions
Intra-individual extractions
Dataset μ σ Δμμ in %) μ σ Δμμ in %)
HRTF 16.7/21.8 1.8/2.6 −1.3 (−7.2)/−0.6 (−2.7) 16.1/21 2.4/4 −1.9 (−10.3)/−1.4 (−6.3)
HARTF (front) 26.8/34.1 7.1/7.7 8.5 (46.7)/11.5 (50.6) 24.5/31.3 0.8/1.4 6.2 (34)/8.6 (38.1)
HARTF (rear) 22.2/27.7 6/7.7 4.1 (22.9)/5.2 (22.8) 19.6/24.6 0.4/0.6 1.6 (8.7)/2 (9.1)

Note: MAEs and RMSEs are provided in μs. μ and σ represent mean and standard deviation, respectively.

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