Fig. 4
From: Spherical harmonic covariance and magnitude function encodings for beamformer design
Sample model fit and inferences are shown for far-field speaker responses by TSVD SH bases and RBF kernels under 4-fold cross-validation. TSVD bias-variance is sensitive to max-order P whereas RBFs are sensitive to the kernel function sharpness; \(K_{\frac {1}{2}, \frac {5}{2}}\) generalizes well, K∞ is too smooth, sinc too sharp