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Noise spectra from flow through aortic valves
Sounds produced by flow of water through orifices in plates and through aortic valves of sheep's hearts were studied; musical tones were produced by cylindrical passages with square entrances, provided that length/ diameter ratio was between one-half and two and Re was between 2000 and 20,000; other orifice shapes and flow through aortic valves produced noise; relationship between degree of artificial stenosis and some characteristic of noise spectrum was sought; partly because of experimental difficulties and also because heart specimens varied in size, such correlation, if it exists, has proved elusive; at present it appears that amplitude vs frequency plots have humps and hollows that increase in magnitude as valve opening decreases.
Noise spectra from flow through aortic valves
Sounds produced by flow of water through orifices in plates and through aortic valves of sheep's hearts were studied; musical tones were produced by cylindrical passages with square entrances, provided that length/ diameter ratio was between one-half and two and Re was between 2000 and 20,000; other orifice shapes and flow through aortic valves produced noise; relationship between degree of artificial stenosis and some characteristic of noise spectrum was sought; partly because of experimental difficulties and also because heart specimens varied in size, such correlation, if it exists, has proved elusive; at present it appears that amplitude vs frequency plots have humps and hollows that increase in magnitude as valve opening decreases.
Noise spectra from flow through aortic valves
ASCE -- Relation Eng Mechanics Research Practice Civ Eng
Hamilton, W.S. (author) / Spindler, M. (author)
ASCE -- Relation of Eng Mechanics Research to Practice of Civil Eng ; 1966
1966
27 pages
Conference paper
English
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