Journal of Electrical and Computer Engineering / 2015 / Article / Fig 4

Research Article

Time-Frequency Analysis of Clinical Percussion Signals Using Matrix Pencil Method

Figure 4

Time-frequency representations of the ideal, noise-free “resonant” (left) and “tympanic” (right) percussion signals shown in Figure 3. The “resonant” signal is a sum of four EDS; the “tympanic” signal is a sum of three EDS. (a) WVD; (b) CWD (); (c) STFT (spectrograms) taken with 1400-point Gaussian window; (d) MPM TFR (amplitudes of the original EDS comprising both signals).

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