Wavelet analysis of phonocardiograms: differences between normal and abnormal heart sounds

Author

Jandre, F.C. ; Souza, M.N.

Author_Institution

COPPE, Univ. Fed. do Rio de Janeiro, Brazil

Volume

4

fYear

1997

fDate

30 Oct-2 Nov 1997

Firstpage

1642

Abstract

Phonocardiography-based diagnosis can be improved by modern techniques of signal processing. This work investigates the analysis of phonocardiograms using the time-frequency distribution generated by the cochlear wavelet transform. We show here a comparative study of normal and abnormal heart sounds, whose scalograms exhibit noticeable morphological differences in terms of duration and spectral composition of sounds. These differences suggest that the cochlear-wavelet-based scalogram can become an interesting approach to design automatic diagnosis systems

Keywords

bioacoustics; cardiology; filtering theory; medical signal processing; patient diagnosis; time-frequency analysis; wavelet transforms; abnormal heart sounds; auscultation; automatic diagnosis systems; cochlear wavelet transform; duration of sounds; morphological differences; normal heart sounds; phonocardiograms; phonocardiography-based diagnosis; scalograms; signal processing; spectral composition of sounds; time-frequency distribution; wavelet analysis; Cardiac disease; Filters; Frequency; Heart; Pathology; Signal analysis; Signal resolution; Statistics; Wavelet analysis; Wavelet transforms;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 1997. Proceedings of the 19th Annual International Conference of the IEEE

Conference_Location

Chicago, IL

ISSN

1094-687X

Print_ISBN

0-7803-4262-3

Type

conf

DOI

10.1109/IEMBS.1997.757032

Filename

757032