Stethoscopes have long been used by physicians to monitor heart and lung sounds(auscultations). Typically stethoscopes have been comprised of a head or chest piece, a sound transmission mechanism and an earpiece assembly. The chest piece is adapted to be placed near or against the skin, body, of a patient for gathering the auscultations. The sound transmission mechanism transmits the gathered sound to an earpiece, or a pair of earpieces called a bin aural earpiece, where the physician or other health professional may monitor the sound.
Recently, some stethoscopes have utilized electronics for at least part of the sound processing path. In most of these devices, the auditory sound is picked up by a microphone usually located in a detection device which is similar to the chest piece of a conventional acoustic stethoscope in external appearance. The electrical signal from the microphone is then processed digitally and is coupled to a speaker, or speakers, where the electrical signal is converted back into an auditory sound for receptionby the physician. Of course, other Digital analysis or display of the auscultations may be performed by the PC using LabVIEW, in addition to the usual conversion back into an auditory sound. In addition,although a Digital Stethoscope allows for the provision of many desirable features, such as noise reduction, signal amplification, wider bandwidth, display of auscultations in different frequency responses. Thus, there is a need in the art for an Digital stethoscope which sounds more like the traditional acoustic stethoscope but which has the additional desirable features which only an Digital stethoscope can provide. The present Digital Stethoscope is designed to emulate the frequency response of a standard acoustical stethoscope in bell, diaphragm and extended range modes, while providing additional features attainable only with a Digital stethoscope, such as signal amplification, noise reduction, wider bandwidth, and rapid mode selection.
The Digital stethoscope includes an idealized diaphragm mode and an idealized bell mode. The idealized diaphragm mode and the idealized bell mode each include emphasized pass bands that are spectrally separate. Each of the idealized diaphragm and idealized bell modes can also include a deemphasized pass band. In addition, the Digital stethoscope can also include a extended range(wide band) mode. The extended range mode permits the user to hear high frequency sounds such as those associated with mechanical heart valves or some lung sounds.
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Thanks for sharing nice information about head heart lung cardiology stethoscope with us. i glad to read this post.
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