Aortic Regurgitation Case Study: 1 
S1 S.Mur S2 dias.mur S1 S2
Weak Systolic Murmur and Prolonged Diastolic Murmur
Diastolic Murmur is clearly visible on the Bell-filtered Phonocardiogram
Diastolic Murmur Frequency Spectrum
Systolic Murmur Frequency Spectrum
S1 S2
Energy Signature of One Heart Beat - Murmurs are weak and almost invisible
Systolic Murmur has Intensity =8.26%; Duration 89.17%;
Frequency Score 57.87Hz and half-bandwidth of 1.35 Hz
(low frequency musical); Grade 1. Diastolic Murmur (our main interest here) has Intensity 9.48%,
Duration 137.5 %; Frequency Score 92.8Hz
and half-bandwidth 36.34; also Grade 1 murmur. 
Diast.Murmur S1(Sp) Sys.mur
Energy Signature of Diastolic and Systolic Periods around S1
Diastolic Murmur Visible frequency track = 50 to 240 Hz 
Frequency Power at Peak Murmur Frequency
Instant Energy Density Spectrum (frequency) of Diastolic Murmur
and Power Distribution at peak murmur frequency
CONCLUSIONS: Diastolic Murmur of is immediately visible on the Phonocardiogram,
systolic murmur is also visible. Diastolic murmur is prolonged
(137% of S1-S2 distance) and weak (9.5% intensity, Grade 1).
Heart Energy signature around S2 heart sound demonstrates
both murmurs and their characteristic frequencies. S1 is split. Heart Sound was taken from the Ears On Auscultation Program
and Database, www.corsonics.com (D.L. Roy, MD; B. Holt) | 
BioSignetics Corporation