Figure 8From: Digital Subtraction Phonocardiography (DSP) applied to the detection and characterization of heart murmurs This shows PCG samples (first & second panels) from a healthy 26 year old man with an innocent heart murmur nother sample figure title. The murmurgram and the corresponding color spectrogram are shown in panels three and four. The murmurgram is relatively "flat" and the frequency of the murmur is largely under 150 Hz (Clinical Case 2).Back to article page