DocumentCode
955376
Title
Instrumentation for Spectral Phonocardiography
Author
Webb, George N. ; McKusick, Victor A.
Author_Institution
Johns Hopkins Hospital Baltimore, Maryland
fYear
1956
fDate
7/1/1956 12:00:00 AM
Firstpage
23
Lastpage
35
Abstract
The development stages of the instrumentation system for displaying the three dimensions of heart sounds, time, frequency and intensity are described. The heart sounds and physiological data are recorded on magnetic tape. The tape information is repetitively played back, filtered and presented as intensity modulation on cathode-ray tubes having a slow TV type raster where the horizontal sweep represents time in the cardiac cycle and the vertical represents frequency. The resulting patterns which are photographed and visually monitored are used for research, teaching and diagnosis.
Keywords
Biomedical monitoring; Cathode ray tubes; Frequency; Heart; Information filtering; Information filters; Instruments; Intensity modulation; Magnetic separation; TV;
fLanguage
English
Journal_Title
Medical Electronics, IRE Transactions on
Publisher
ieee
ISSN
0097-1049
Type
jour
DOI
10.1109/IRET-ME.1956.5008571
Filename
5008571
Link To Document