Detecting the split within heart sounds using a switched-capacitor filter

Author

Altrabsheh, B. ; Torry, JN

Author_Institution

Sch. of Eng., Sussex Univ., Brighton, UK

fYear

1998

fDate

13-16 Sep 1998

Firstpage

597

Lastpage

600

Abstract

When making heart sound recordings, it is important to identify key features in real time, i.e. just prior and during the recording process. Hardware filtering on the incoming signal provides a means of getting a clearer picture. Using a switched-capacitor band-pass filter tuned to the characteristic domain frequency of the first heart sound, SI, enables observation of the split of SI into the Mitral and Tricuspic components M1 and T1. This contribution discusses results from setting up a practical system and what limitations were encountered

Keywords

acoustic signal processing; band-pass filters; bioacoustics; capacitors; cardiology; medical signal detection; medical signal processing; characteristic domain frequency; first heart sound; hardware filtering; heart sound recordings; heart sounds split detection; key features identification; mitral components; real time; switched-capacitor band-pass filter; switched-capacitor filter; tricuspic components; Band pass filters; Cutoff frequency; Delay; Ear; Filtering; Heart; Humans; Low pass filters; Phase distortion; Signal processing;

fLanguage

English

Publisher

ieee

Conference_Titel

Computers in Cardiology 1998

Conference_Location

Cleveland, OH

ISSN

0276-6547

Print_ISBN

0-7803-5200-9

Type

conf

DOI

10.1109/CIC.1998.731944

Filename

731944