Electronic stethoscope with idealized bell and idealized...

A - Human Necessities – 61 – B

Patent

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A61B 7/04 (2006.01)

Patent

CA 2236961

An electronic stethoscope emulates the frequency response of a standard acoustical stethoscope in both bell and diaphragm modes, while providing additional features attainable only with an electronic stethoscope, such as signal amplification, noise reduction, wider bandwith, and mode selection. The electronic stethoscope includes spectrally separate idealized diaphragm and idealized bell modes. The idealized diaphragm mode and the idealized bell mode each include emphasized passbands and de-emphasized passbands. The emphasized passbands are spectrally separate. In addition, the electronic stethoscope also includes a wideband mode, which permits the user to hear high frequency sounds such as those associated with mechanical heart valves, lung sounds, and the like.

Cette invention se rapporte à un stéthoscope électronique qui parvient à émuler la réponse en fréquence d'un stéthoscope acoustique traditionnel à la fois en mode sonnerie et en mode diaphragme, tout en offrant des caractéristiques additionnelles qu'on ne peut obtenir qu'avec un stéthoscope électronique tel que l'amplification du signal, la réduction du bruit, l'extension de la largeur de bande et la sélection des modes. Ce stéthoscope électronique comprend des modes diaphragme et sonnerie idéalisés à spectres éparés. Le mode diaphragme idéalisé et le mode sonnerie idéalisé comportent chacun des bandes passantes accentuées et des bandes passantes désaccentuées. Les bandes passanges accentuées ont des spectres séparés. Ce stéthoscope électronique a également un mode à bande large, qui permet à l'utilisateur d'entendre les sons haute fréquences tels que ceux associés à des valvules cardiaques artificielles, des sons provenant des poumons et similaires.

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