Designing a Simulation Model for Cardiac Sounds and Checking the Accuracy of the Convertors Used in Microcontroller for This Type of Applications

Abstract

In this research, a computer simulation was carried out using the famous electronic systems simulation program PROTEUS 8 ISIS to design the circuit to collect the heart and chest sounds from the surface of the human body (electronic stethoscope). The audio signal received from the output of the analog Multiplexer was processed using ATmega8 microcontroller. The experimental results were performed on the first cardiac signal S1 using the ADC and DAC circuits used in analog to digital conversion to signal the taking of 20 random samples from the signal.

Keywords: stethoscope, acoustic, Heart sounds, controller, analog to digital convertor, digital to analog convertor.