Frontal EEG Temporal and Spectral Dynamics Similarity Analysis between Propofol and Desflurane Induced Anesthesia Using Hilbert-Huang Transform

Figure 5

Time frequency plots of signals with white noise. (a) Original signal; (b) signal with 8dB SNR white noise added; (c) signal with 4dB SNR white noise added; (d) traditional multitaper spectrogram of original signal in (a); (e) traditional multitaper spectrogram of signal in (b); (f) traditional multitaper spectrogram of signal in (c); (g) corresponding HHT of original signal, (h) corresponding HHT of signal in (b); (i) corresponding HHT of signal in (c). SNR: signal to noise ratio.