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dc.contributor.authorBaykal, A.en_US
dc.contributor.authorİder, Y. Z.en_US
dc.contributor.authorKöymen, H.en_US
dc.date.accessioned2015-07-28T11:55:46Z
dc.date.available2015-07-28T11:55:46Z
dc.date.issued1995-04en_US
dc.identifier.issn0018-9294
dc.identifier.urihttp://hdl.handle.net/11693/10782
dc.description.abstractIt has been previously proposed that heart valve closure sounds can be modeled by a sum of decaying sinusoids, based on the hypothesis that the heart cavity, heart walls, major vessels, and other structures in the chest constitute a frequency selective linear acoustic system and this system is excited by the rapidly decelerating valve occluder. In this study, distribution of the parameters of this model for the second heart sound is investigated. For this purpose, heart sounds of 10 patients who have a St. Jude-type bileaflet mechanical heart valve prosthesis in aortic position are recorded. Recordings are performed at 12 different locations on the surface of the chest. To reliably assign representative parameters to each recording site, signal averaging, model order selection, and a special filtration technique are employed. The results of the analyses are discussed in relation to the above hypothesis on the heart sound generation mechanism. It is observed that site-to-site variation of frequencies of modes does not exceed the accuracy limit of proposed analysis method, but energies of these modes vary on the surface of the chest, and as a result of statistical analysis, it appears that energy of some modes are significantly different between two recording sites.en_US
dc.language.isoEnglishen_US
dc.source.titleIEEE Transactions on Biomedical Engineeringen_US
dc.relation.isversionofhttp://dx.doi.org/10.1109/10.376129en_US
dc.subjectProstheticsen_US
dc.subjectHeart valvesen_US
dc.subjectCutoff frequencyen_US
dc.subjectAcoustical engineeringen_US
dc.subjectPathologyen_US
dc.subjectFiltrationen_US
dc.subjectStatistical analysisen_US
dc.subjectCardiologyen_US
dc.subjectFeature extractionen_US
dc.subjectMathematical modelen_US
dc.titleDistribution of aortic mechanical prosthetic valve closure sound model parameters on the surface of the chesten_US
dc.typeArticleen_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.citation.spage358en_US
dc.citation.epage370en_US
dc.citation.volumeNumber42en_US
dc.citation.issueNumber4en_US
dc.identifier.doi10.1109/10.376129en_US
dc.publisherInstitute of Electrical and Electronics Engineersen_US
dc.identifier.eissn1558-2531


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