A low cost stethoscopic system for real time auscultation of heart sound

Author

Jahan, Md Sarwar ; Aowlad Hossain, A.B.M.

Author_Institution

Khulna Univ. of Eng. & Technol., Khulna, Bangladesh

fYear

2014

fDate

23-24 May 2014

Firstpage

1

Lastpage

4

Abstract

Auscultation of heart sounds has great importance as they are related to the anatomy and physiology of cardiovascular systems as well as to diagnosis of cardiovascular disease. In this paper, a microcontroller based stethoscopic system for auscultation of heart has been presented with a strategic emphasis on low-cost and real time capability. The system consists of acoustic sensor, filter, signal processing system, speaker and display devices etc. The heart sound signal has been acquisited and passed through 20-250 Hz band-pass filter before processed by ATmega8A microcontroller. Output has been shown in real-time through LED blinking as well as processed to display the cardiac waveform and beat rate. Performance of this device is good in terms of accuracy. Within around 11$ this device can be implemented, which is cheaper compared to other digital stethoscopes available on market.

Keywords

band-pass filters; bioelectric potentials; biomedical ultrasonics; cardiovascular system; light emitting diodes; medical signal detection; medical signal processing; microcontrollers; sensors; LED blinking; acoustic sensor; band-pass filter; beat rate; cardiac waveform; cardiovascular disease diagnosis; cardiovascular system anatomy; cardiovascular system physiology; display devices; frequency 20 Hz to 250 Hz; heart sound signal acquisition; heart sound signal processing; microcontroller based stethoscopic system; real time heart sound auscultation; speaker; Acoustic sensors; Band-pass filters; Heart; Microcontrollers; Microphones; Real-time systems; Stethoscope; Heart sound acquisition; beat rate; cardiac waveform; filtering; real-time auscultation;

fLanguage

English

Publisher

ieee

Conference_Titel

Informatics, Electronics & Vision (ICIEV), 2014 International Conference on

Conference_Location

Dhaka

Print_ISBN

978-1-4799-5179-6

Type

conf

DOI

10.1109/ICIEV.2014.6850764

Filename

6850764