II.  Low-power Biosignal Acquisition Systems

Overview 

Stethoscopes are a vital diagnostic tool in the medical field. Nowadays, doctors frequently use conventional stethoscopes since they are less expensive than electronic ones. However the amplification and recording capabilities of a traditional stethoscope are constrained. Therefore, electronic stethoscopes, which are non-invasive, inexpensive, and widely available diagnostic tool that can provide valuable information about the heart's health have been created to address this issue.  

Purpose

Design a cost-effective and simple electronic stethoscope apply in ausculation teaching with features: amplify heart sound, record heart sound, support in ausculation.

Development Direction 

In this study, a low-cost electronic stethoscope with a hearing output jack and real-time cardiac sound realization based on the Arduino UNO R3 is presented. To enable the connection between the stethoscope and the laptop, a Bluetooth module was used. With Excel, the heart sound signal can be stored and displayed. It also activates additional processing to determine heart rate.

Related Knowledge 

• Basic understanding about biological characteristics of heart sound

• Electronic stethoscope: signal conditioning, analog front end designs, transmission circuit

• Software: TINA - TI simulation tool, Altium Designer, Arduino IDE

Poster

1. Research On Design A Low-cost Electronic Stethoscope

2. Design and Implementation of  A Low-cost and Real Time Electronic Stethoscope