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

Figure 1

Two examples of audible percussion signals collected from healthy volunteers: (a) Signal from the left subclavicular area (“resonant” character); (b) signal from the left abdominal area (“tympanic” character). The normalized spectra of both signals are shown in (c).

(a) Resonant signal

(b) Tympanic signal

(c)