Figure 4
(a) Validation accuracies of CNNs trained by amplitude, phase, and both features extracted from siren signals measured by resonator-based sensor. (b)–(d) confusion matrix plots that quantify the performance of corresponding CNNs in (a) on test data (accuracy values shown by the blue font). (e) validation accuracies the CNNs trained by amplitude, phase, and both features extracted from siren signals measured by reference sensor (no resonators). (f)–(h) confusion matrix plots and accuracies of CNN on test data corresponding to the three scenarios in (e).
