Histograms for matched filter S/N distribution of the LIGO L1, H1 (left), and Virgo V1 (right) test sets. The dark red thinner bars represent the number of signals misclassified by the merged LSTM and CNN model at each S/N interval. The bin widths are 2 for L1, H1 and 0.5 for V1, with the exception of m39 which has a larger S/N range. For the latter model the binning is equal to 8 for L1, H1 and 2 for V1.