The Fast Fourier Transform in the Analysis of the Normal Phonocardiogram
-
- LONGAINI C.
- Istituto di Clinica Medica, Università di Ferrara
-
- PORTALUPPI F.
- Istituto di Clinica Medica, Università di Ferrara
-
- ARSLAN E.
- Clinica Otorinolaringoiatrica Università di Ferrara
-
- PEDRIELLI F.
- Istituto di Fisica, Università di Ferrara
Bibliographic Information
- Other Title
-
- fast Fourier Transform in the Analysis
Search this article
Abstract
The present study is focused on spectrum analysis as a useful method of processing the PCG in order to obtain the frequency spectral distribution of normal heart sounds.<br>Thirty normal subjects aged from 17 to 34 were studied. PCG was recorded on the fourth intercostal space at the left sternal border using a sound level meter coupled with a standard 6ml cavity. The microphone had a linear response from 0.2 to 8, 000Hz. The signal was filtered with the standard B network according to the ANSI specifications and was registered on a four track FM tape recorder. A four channel analyzer with a microprocessor for off-line elaborations was used with 10KHz sampling frequency. The PCG signal was triggered by a QRS detector on the R wave of the simultaneously recorded ECG. Fast Fourier transform was performed employing either a four channel analyzer with a microprocessor, or an A/D converter with a computer. Finally the results of the analysis were statistically elaborated.<br>The described procedures permit to obtain a direct and exact tracing of the acoustic features of the heart, thus representing an attempt to come closer to the standardization and automatic analysis of the phonocardiographic technique.
Journal
-
- Japanese Heart Journal
-
Japanese Heart Journal 20 (3), 333-339, 1979
International Heart Journal Association
- Tweet
Details 詳細情報について
-
- CRID
- 1390282680015660928
-
- NII Article ID
- 130000762142
-
- NII Book ID
- AA00690786
-
- ISSN
- 1348673X
- 00214868
-
- NDL BIB ID
- 2086107
-
- PubMed
- 459101
-
- Text Lang
- en
-
- Data Source
-
- JaLC
- NDL
- Crossref
- PubMed
- CiNii Articles
-
- Abstract License Flag
- Disallowed