Sistema de aquisição e processamento digital de sinais para sons corporais

Abstract

The current paper presents the activities made intending on the development of a digital stethoscope prototype. There are shown the main concepts of human physiology, which are essential to the understanding of the cardiac and pulmonary auscultation. There are also presented the concepts about digital signal processing and digital filtering, the focus of this work. Whit the understanding of these theories, thru a microcontroller configuration, it was developed an algorithm using digital filters, capable of filter corporal sounds in a proper way, intending the digital stethoscope implementation. The development process of these filters and the results of the tests and simulations made is presented, allowing a final argue about the importance of this type of technology in medical practice, possibility of improvement on the digital filtering process, and an effective implementation on a digital stethoscope.