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A Littmann stethoscope. David Littmann (July 28, 1906 – January 1, 1981) was an American cardiologist and Harvard Medical School professor and researcher. [1] The name Littmann is well known in the medical field for the patented Littmann Stethoscope reputed for its acoustic performances for auscultation.
Currently, a number of companies offer electronic stethoscopes. Electronic stethoscopes require conversion of acoustic sound waves to electrical signals which can then be amplified and processed for optimal listening. Unlike acoustic stethoscopes, which are all based on the same physics, transducers in electronic stethoscopes vary widely.
Eko was founded in 2013 by Connor Landgraf, Jason Bellet, and Tyler Crouch. Landgraf was inspired to create Eko after seeing the limitations of traditional stethoscopes during his studies in biomedical engineering at the University of California, Berkeley and recruited his classmates Bellet and Crouch to join him.
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An electromagnetic diaphragm is a form of capacitive sensor used on an electronic stethoscope.The diaphragm is coated with a conductive material.A conductive plate is positioned behind and parallel to the diaphragm, so that the two conductive elements form a capacitor.
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