Definition of Phonocardiograph

1. Noun. (medicine) A device that records (and displays) the sounds made by the heart. ¹

¹ Source: wiktionary.com

Medical Definition of Phonocardiograph

1. An instrument, utilizing microphones, amplifiers, and filters, for graphically recording the heart sounds, which are displayed on an oscilloscope or analog tracing. Linear phonocardiograph, a phonocardiograph that records all chest wall vibrations resulting from cardiac activity, with emphasis on low frequency vibrations due to its filter characteristics. Logarithmic phonocardiograph, a phonocardiograph that records only theoretically audible vibrations with emphasis on the higher frequencies due to filter characteristics designed to imitate the logarithmic frequency-intensity response of the human auditory apparatus. Spectral phonocardiograph, an instrument for recording the heart sounds in which the electrical changes created by the latter pass from a microphone through a series of filters, each of which is tuned to a particular frequency band; output from each filter activates a separate light source of brightness proportional to the intensity of the sound transmitted through that filter; the lights are arranged vertically in descending order of frequencies. A record is obtained by photographing the vertical row of lights. Stethoscopic phonocardiograph, a phonocardiograph that records all sound vibrations, audible and inaudible, conveyed by the stethoscope; however, very low frequency vibrations (in the range of body movements) are filtered out. (05 Mar 2000)

Lexicographical Neighbors of Phonocardiograph

phoniest
phonily
phoniness
phoninesses
phoning
phonino
phono
phono-
phono cartridge
phonoangiography
phonobreather
phonobreathers
phonocamptic
phonocardiogram
phonocardiograms
phonocardiograph
phonocardiographs
phonocardiography
phonocatheter
phonocentrism
phonocentrisms
phonofiddle
phonofiddles
phonogenic
phonogram
phonogramic
phonogramically
phonogramme
phonogrammes
phonogrammic

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