Design and Implementation of Heart Sound Detection Device Based on MEMS MIC.
10.3969/j.issn.1671-7104.2019.05.007
- Author:
Dayu DING
1
;
Qing LI
2
;
Yapeng DONG
1
;
WangYing WANG
2
;
Bo YANG
1
Author Information
1. Key Laboratory of Biological Effects and Instruments of Sichuan Province, Chengdu, 610225.
2. School of Electronic Engineering, Chengdu University of Information Technology, Chengdu, 610225.
- Publication Type:Journal Article
- Keywords:
composite probe;
empirical mode decomposition;
heart sound signal;
high gain
- MeSH:
Heart;
Heart Sounds;
Humans;
Micro-Electrical-Mechanical Systems;
Signal Processing, Computer-Assisted;
Stethoscopes
- From:Chinese Journal of Medical Instrumentation
2019;43(5):337-340
- CountryChina
- Language:Chinese
-
Abstract:
The paper describes how to develop a digital heart sound signal detection device based on high gain MEMS MIC that can accurately collect and store human heart sounds. According to the method of collecting heart sound signal by traditional stethoscope, the system improves the traditional stethoscope, and a composite probe equipped with a MEMS microphone sensor is designed. The MEMS microphone sensor converts the sound pressure signal into a voltage signal, and then amplifies, converts with Sigma Delta, extracts and filters the collected signal. After the heart sound signal is uploaded to the PC, the Empirical Mode Decomposition (EMD) is carried out to reconstruct the signal, and then the Independent Component Analysis (ICA) method is used for blind source separation and finally the heart rate is calculated by autocorrelation analysis. At the end of the paper, a preliminary comparative analysis of the performance of the system was carried out, and the accuracy of the heart sound signal was verified.
