Figure 8. Example of the normalized amplitude of the pump ID: 06 at SNR 6 dB, frequency in the time domain ( top row) Figure 8. Example of the normalized amplitude of the pump ID: 06 at SNR 6 dB, frequency in the time domain (top row) and corresponding power spectrogram (bottom row) on normal condition (left column) and anomalous condition (right and corresponding power spectrogram ( bottom row) on normal condition ( left column) and anomalous condition ( right column).