Optimal time-window duration for computing time / frequency representations of normal phonocardiograms in dogs

DC FieldValueLanguage
dc.contributor.authorJamous, Ghaleb-
dc.contributor.authorDurand, Louis-Gilles-
dc.contributor.authorLanglois, Yves-
dc.contributor.authorLanthier, Thérèse-
dc.contributor.authorPibarot, Philippe-
dc.contributor.authorCarioto, Suzanne-
dc.date.accessioned2016-07-11T17:01:44Z-
dc.date.available10000-01-01-
dc.date.issued1992-09-01-
dc.identifier.issn0140-0118fr_CA
dc.identifier.urihttp://hdl.handle.net/20.500.11794/8528-
dc.description.abstractThe optimal duration of the time-window used to compute the time-frequency representation (spectrogram) of the phonocardiogram was studied in four dogs by using intracardiac and thoracic measurements of the PCG. The power and cross-spectrograms of the intracardiac and thoracic PCGs were computed using a fast Fourier transform algorithm and a sine-cosine window with 10 per cent decaying functions. A coherence spectrogram was also computed for each dog to study the linear relationship between the two signals and determine the optimal time-window duration. Results show that the optimal range of the time-window duration is between 16 and 32 ms. A time-window shorter than 16ms spreads out low-frequency components into the higher frequencies and generates a spectrographic representation with poor frequency resolution (=62·5 Hz). A window larger than 32 ms increases the frequency resolution but smears the spectrographic representation of the signal in the time domain and thus cannot correctly reflect the time-varying properties of the signal. In both cases, the amplitude of the coherence function computed between the left ventricular and the thoracic phonocardiograms is overestimated.fr_CA
dc.languageengfr_CA
dc.publisherSpringerfr_CA
dc.subjectCoherence functionfr_CA
dc.subjectPhonocardiogramfr_CA
dc.subjectSpectrographic analysisfr_CA
dc.subjectTime-window durationfr_CA
dc.titleOptimal time-window duration for computing time / frequency representations of normal phonocardiograms in dogsfr_CA
dc.typeCOAR1_1::Texte::Périodique::Revue::Contribution à un journal::Article::Article de recherche-
dcterms.bibliographicCitationMedical and Biological Engineering and Computing, Vol. 30 (5), 503–508 (1992)fr_CA
dc.audienceCardiologuesfr_CA
dc.audienceVétérinairesfr_CA
dc.audienceProfesseurs (Enseignement supérieur)fr_CA
dc.audienceÉtudiantsfr_CA
dc.audienceDoctorantsfr_CA
dc.identifier.doi10.1007/BF02457829fr_CA
dc.identifier.pubmed1293441fr_CA
dc.subject.rvmPhonocardiographiefr_CA
dc.subject.rvmChiens (Animaux de laboratoire)fr_CA
dc.subject.rvmSpectroscopiefr_CA
dc.subject.rvmModèles mathématiquesfr_CA
rioxxterms.versionVersion of Recordfr_CA
rioxxterms.version_of_recordhttps://doi.org/10.1007/BF02457829fr_CA
bul.rights.periodeEmbargoInfinifr_CA
Collection:Articles publiés dans des revues avec comité de lecture

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