Spectral correlations.

<p><b>A:</b> A measure of the similarity between the different reconstructed spectral shapes of listener S4 is given by the correlation matrix, <i>C</i>(<i>ε</i>₁, <i>ε</i>₂). Grayscale values indicate correlation values between 0.5 and 1, with the contour lines at 0.1 steps, with darker grayscale values for higher correlations. <b>B:</b> The correlation matrix for the three reconstructed spectra and the DTFs of listener S4. Grayscale values indicate correlation values between 0.2 and 1. The correlation matrix is high only for locations on, or near, the main diagonal.