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Independent Stethoscope Review - Comparative review of stethoscopes, including frequency response graphs. Auscultation Lessons and Reference Guide - Compilation of 100+ Heart and Lung Sounds and Phonocardiograms; Wave Doppler Auscultation - Cardiac Continuous Wave Doppler audio and video examples
Additionally, electronic stethoscopes can be used to filter out background noise, a feature that can be safety-relevant and facilitate more accurate diagnoses. Whereas sound amplification and filtering are the main functions of an electronic stethoscope, the ability to access the sounds through external means via Bluetooth or audio cables makes ...
A 3D-printed stethoscope is an open-source medical device meant for auscultation and manufactured via means of 3D printing. [31] The 3D stethoscope was developed by Dr. Tarek Loubani and a team of medical and technology specialists. The 3D-stethoscope was developed as part of the Glia project, and its design is open source from the outset.
An extended-ratings version of the 6P14P is also available, the 6P14P-EV (Cyrillic: 6П14П-ЕВ), and it is known among US guitar players as EL84M or the Russian military EL84. While not necessarily a true military version of the tube (in fact it is more comparable to the 7189), 6P14P-EVs are known for their low noise and durability.
Respiratory sounds, also known as lung sounds or breath sounds, are the specific sounds generated by the movement of air through the respiratory system. [1] These may be easily audible or identified through auscultation of the respiratory system through the lung fields with a stethoscope as well as from the spectral characteristics of lung sounds. [2]
6N3C power tube. A valve amplifier or tube amplifier is a type of electronic amplifier that uses vacuum tubes to increase the amplitude or power of a signal.Low to medium power valve amplifiers for frequencies below the microwaves were largely replaced by solid state amplifiers in the 1960s and 1970s.
NAD Electronics is a brand name of an electronics firm whose products include home hi-fi amplifiers and related components. NAD is an abbreviation for New Acoustic Dimension . The company was founded in London , England , in 1972 by Dr. Martin L. Borish, an electrical engineer with a PhD in physics.
Valve Amplification Company (VAC) is a U.S. supplier of high end audio electronics, principally utilizing vacuum tube technology. It was founded in 1990 by Kevin Hayes (b. 1959) and Channing W. Hayes (1923–2009).
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