phonocardiograph

phonocardiograph
An instrument, utilizing microphones, amplifiers, and filters, for graphically recording the heart sounds, which are displayed on an oscilloscope or analog tracing.
- linear p. a p. that records all chest wall vibrations resulting from cardiac activity, with emphasis on low-frequency vibrations due to its filter characteristics.
- logarithmic p. a p. 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 p. 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 p. a p. 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.

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pho·no·car·dio·graph -.graf n an instrument used for producing a graphic record of heart sounds and consisting of microphones, an amplifier, and recording equipment

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pho·no·car·dio·graph (fo″no-kahrґde-o-graf) [phono- + cardiograph] the instrument used in phonocardiography, generally comprising a microphone, amplifier, filters, and a recording device.

Medical dictionary. 2011.

См. также в других словарях:

  • phonocardiograph — fonokardiografas statusas T sritis Standartizacija ir metrologija apibrėžtis Medicininis elektroninis aparatas širdies veiklos sukeltiems tonams ir ūžesiams tirti. atitikmenys: angl. phonocardiograph vok. Phonokardiograph, m rus. фонокардиограф,… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • phonocardiograph — noun see phonocardiography …   New Collegiate Dictionary

  • phonocardiograph — phonocardiography /foh neuh kahr dee og reuh fee/, n. /foh neuh kahr dee euh graf , grahf /, n. Med. an instrument for graphically recording the sound of the heartbeat. [1925 30; PHONO + CARDIOGRAPH] * * * …   Universalium

  • phonocardiograph — noun A device that records (and displays) the sounds made by the heart See Also: phonocardiogram, phonocardiographic, phonocardiography …   Wiktionary

  • phonocardiograph — n. device used to record heart sounds (Medicine) …   English contemporary dictionary

  • phonocardiograph — pho·no·cardiograph …   English syllables

  • phonocardiograph — pho•no•car•di•o•graph [[t]ˌfoʊ nəˈkɑr di əˌgræf, ˌgrɑf[/t]] n. med an instrument for graphically recording the sound of the heartbeat • Etymology: 1925–30 pho no•car di•og′ra•phy ˈɒg rə fi n …   From formal English to slang

  • phonocardiograph — ¦fōnəˌ noun Etymology: phon + cardiograph : a recording instrument used in phonocardiography …   Useful english dictionary

  • fetal phonocardiograph — an instrument which provides continuous, instantaneous recording of fetal heart sounds …   Medical dictionary

  • William R. Bennett, Jr. — William R. Bennett (January 30, 1930 June 29, 2008) was an American physicist known for his pioneering work on gas lasers. He spent most of his career on the faculty of Yale University.CareerBennett s graduate work in physics was on spectroscopy… …   Wikipedia


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