Fig. 4
From: A CNN-based approach to identification of degradations in speech signals
Visualization of the saliency map, plotted in blue shading on top of the gray-scale signal spectrogram, by applying the score-CAM method to the log-mel spectrogram of a normal running speech signal degraded by three types of degradation. The intensity of the saliency map, shown on a scale of 0 to 255 by the colorbars, illustrates the importance of each region of the input space to the target class